Old Exam studying stuff
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<title>PrimeNumbers.java</title>
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<table width="100%"><tr><td align="center">/home/caleb/ASDV-Java/Assignments/lab14_CalebFontenot/src/lab14_calebfontenot/PrimeNumbers.java</td></tr></table>
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<pre>
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<span class="comment">/*</span>
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<span class="comment"> * Click </span><span class="ST0">nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt</span><span class="comment"> to change this license</span>
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<span class="comment"> * Click </span><span class="ST0">nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java</span><span class="comment"> to edit this template</span>
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<span class="comment"> */</span>
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<span class="literal">package</span> lab14_calebfontenot;
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<span class="comment">/**</span>
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<span class="comment"> *</span>
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<span class="comment"> * </span><span class="comment">@author</span> <span class="comment">caleb</span>
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<span class="comment">*/</span>
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<span class="literal">public</span> <span class="literal">class</span> PrimeNumbers {
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<span class="literal">public</span> <span class="literal">static</span> <span class="literal">void</span> <span class="ST1">main</span>(String[] args)
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{
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System.<span class="ST2">out</span>.println(<span class="string">"</span><span class="string">The first 50 prime numbers are: </span><span class="literal">\n</span><span class="string">"</span>);
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<span class="ST3">printPrimeNumbers</span>(<span class="number">5</span><span class="number">0</span>);
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}
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<span class="literal">public</span> <span class="literal">static</span> <span class="literal">void</span> <span class="ST1">printPrimeNumbers</span>(<span class="literal">int</span> numberOfPrimes) {
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<span class="literal">final</span> <span class="literal">int</span> NUMBER_OF_PRIMES_PER_LINE = <span class="number">10</span>; <span class="comment">// Display 10 per line</span>
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<span class="literal">int</span> count = <span class="number">0</span>; <span class="comment">// Count the number of prime numbers</span>
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<span class="literal">int</span> number = <span class="number">1</span>; <span class="comment">// A number to be tested for primeness</span>
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<span class="comment">//> Repeatedly find prime numbers</span>
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<span class="literal">while</span> (count < numberOfPrimes) {
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<span class="comment">//>> Print the prime number and increase the count</span>
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<span class="literal">if</span> (<span class="ST3">isPrime</span>(number)) {
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count++; <span class="comment">// Increase the count</span>
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<span class="literal">if</span> (count % NUMBER_OF_PRIMES_PER_LINE == <span class="number">0</span>) {
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<span class="comment">//>> Print the number and advance to the new line</span>
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System.<span class="ST2">out</span>.printf(<span class="string">"</span><span class="string">%-5d</span><span class="literal">\n</span><span class="string">"</span>, number);
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}
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<span class="literal">else</span> {
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System.<span class="ST2">out</span>.printf(<span class="string">"</span><span class="string">%-5d</span><span class="string">"</span>, number);
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}
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}
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<span class="comment">//>> Check if the next number is prime</span>
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number++;
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}
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}
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<span class="literal">public</span> <span class="literal">static</span> <span class="literal">boolean</span> <span class="ST1">isPrime</span>(<span class="literal">int</span> number) {
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<span class="literal">for</span> (<span class="literal">int</span> divisor = <span class="number">2</span>; divisor <= number / <span class="number">2</span>; divisor++) {
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<span class="literal">if</span> (number % divisor == <span class="number">0</span>) {
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<span class="comment">// If true, number is not prime</span>
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<span class="literal">return</span> <span class="literal">false</span>;
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}
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}
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<span class="literal">return</span> <span class="literal">true</span>; <span class="comment">// number is prime</span>
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}
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}
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</pre></body>
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<html>
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<head>
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<title>StaticMethods.java</title>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<style type="text/css">
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pre {color: #a9b7c6; background-color: #2b2b2b; font-family: monospace; font-weight: bold}
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table {color: #888888; background-color: #313335; font-family: monospace; font-weight: bold}
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</style>
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<body>
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<table width="100%"><tr><td align="center">/home/caleb/ASDV-Java/Assignments/lab14_CalebFontenot/src/lab14_calebfontenot/StaticMethods.java</td></tr></table>
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<pre>
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<span class="comment">/*</span>
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<span class="comment"> * Click </span><span class="ST0">nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt</span><span class="comment"> to change this license</span>
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<span class="comment"> * Click </span><span class="ST0">nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java</span><span class="comment"> to edit this template</span>
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<span class="comment"> */</span>
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<span class="literal">package</span> lab14_calebfontenot;
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<span class="literal">import</span> java.util.Scanner;
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<span class="comment">/**</span>
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<span class="comment"> *</span>
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<span class="comment"> * </span><span class="comment">@author</span> <span class="comment">caleb</span>
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<span class="comment">*/</span>
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<span class="literal">public</span> <span class="literal">class</span> StaticMethods {
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<span class="literal">static</span> <span class="literal">int</span> <span class="ST1">executeCount</span> = <span class="number">0</span>;
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<span class="literal">public</span> <span class="literal">static</span> <span class="literal">void</span> <span class="ST2">main</span>(String[] args)
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{
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StaticMethods.<span class="ST3">printJava</span>();
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<span class="literal">for</span> (<span class="literal">int</span> i = <span class="number">0</span>; i < <span class="number">20</span>; i++) {
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<span class="literal">for</span> (<span class="literal">int</span> y = <span class="number">0</span>; y < <span class="number">5</span>; y++) {
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StaticMethods.<span class="ST3">printMyName</span>();
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}
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System.<span class="ST1">out</span>.println();
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}
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<span class="ST1">executeCount</span> = <span class="number">0</span>;
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<span class="literal">for</span> (<span class="literal">int</span> i = <span class="number">0</span>; i < <span class="number">50</span>; i++) {
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<span class="literal">for</span> (<span class="literal">int</span> y = <span class="number">0</span>; y < <span class="number">2</span>; y++) {
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StaticMethods.<span class="ST3">printMessage</span>(<span class="string">"</span><span class="string">Java is fun!</span><span class="string">"</span>);
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}
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System.<span class="ST1">out</span>.println();
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}
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System.<span class="ST1">out</span>.println(StaticMethods.<span class="ST3">squareNumber</span>(<span class="number">5</span>));
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System.<span class="ST1">out</span>.println(StaticMethods.<span class="ST3">squareNumber</span>(<span class="number">5</span><span class="number">.0</span>));
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System.<span class="ST1">out</span>.println(StaticMethods.<span class="ST3">cubeNumber</span>(<span class="number">5</span>));
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System.<span class="ST1">out</span>.println(StaticMethods.<span class="ST3">cubeNumber</span>(<span class="number">5</span><span class="number">.0</span>));
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System.<span class="ST1">out</span>.println(StaticMethods.<span class="ST3">menu</span>());
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<span class="literal">char</span> menuReturn = StaticMethods.<span class="ST3">menu</span>();
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<span class="literal">if</span> (menuReturn == <span class="string">'</span><span class="string">c</span><span class="string">'</span>) {
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System.<span class="ST1">out</span>.println(StaticMethods.<span class="ST3">cubeNumber</span>(<span class="number">5</span>));
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System.<span class="ST1">out</span>.println(StaticMethods.<span class="ST3">cubeNumber</span>(<span class="number">5</span><span class="number">.0</span>));
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} <span class="literal">else</span> <span class="literal">if</span> (menuReturn == <span class="string">'</span><span class="string">s</span><span class="string">'</span>) {
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System.<span class="ST1">out</span>.println(StaticMethods.<span class="ST3">squareNumber</span>(<span class="number">5</span>));
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System.<span class="ST1">out</span>.println(StaticMethods.<span class="ST3">squareNumber</span>(<span class="number">5</span><span class="number">.0</span>));
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}
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System.<span class="ST1">out</span>.println(StaticMethods.<span class="ST3">menuInteger</span>());
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<span class="comment">// Area</span>
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Scanner input = <span class="literal">new</span> Scanner(System.<span class="ST1">in</span>);
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System.<span class="ST1">out</span>.print(<span class="string">"</span><span class="string">Enter the number of sides: </span><span class="string">"</span>);
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<span class="literal">int</span> n = input.nextInt();
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System.<span class="ST1">out</span>.print(<span class="string">"</span><span class="string">Enter the side: </span><span class="string">"</span>);
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<span class="literal">double</span> side = input.nextDouble();
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<span class="comment">// Call the area function</span>
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System.<span class="ST1">out</span>.println(<span class="string">"</span><span class="string">The area of the polygon is: </span><span class="string">"</span> + StaticMethods.<span class="ST3">area</span>(n, side));
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}
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<span class="literal">public</span> <span class="literal">static</span> <span class="literal">void</span> <span class="ST2">printJava</span>() {
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System.<span class="ST1">out</span>.println(<span class="string">"</span><span class="string">Java</span><span class="string">"</span>);
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}
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<span class="literal">public</span> <span class="literal">static</span> <span class="literal">void</span> <span class="ST2">printMyName</span>() {
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System.<span class="ST1">out</span>.print(<span class="string">"</span><span class="string">Caleb Fontenot </span><span class="string">"</span>);
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System.<span class="ST1">out</span>.print(++<span class="ST1">executeCount</span> + <span class="string">"</span> <span class="string">"</span>);
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}
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<span class="literal">public</span> <span class="literal">static</span> <span class="literal">void</span> <span class="ST2">printMessage</span>(String msg) {
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System.<span class="ST1">out</span>.print(msg + <span class="string">"</span> <span class="string">"</span>);
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System.<span class="ST1">out</span>.print(++<span class="ST1">executeCount</span> + <span class="string">"</span> <span class="string">"</span>);
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}
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<span class="literal">public</span> <span class="literal">static</span> <span class="literal">int</span> <span class="ST2">squareNumber</span>(<span class="literal">int</span> number) {
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System.<span class="ST1">out</span>.println(<span class="string">"</span><span class="string">INT (squre) was called</span><span class="string">"</span>);
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<span class="literal">return</span> number * number;
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}
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<span class="literal">public</span> <span class="literal">static</span> <span class="literal">double</span> <span class="ST2">squareNumber</span>(<span class="literal">double</span> number) {
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System.<span class="ST1">out</span>.println(<span class="string">"</span><span class="string">DOUBLE (square) was called</span><span class="string">"</span>);
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<span class="literal">return</span> number * number;
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}
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<span class="literal">public</span> <span class="literal">static</span> <span class="literal">int</span> <span class="ST2">cubeNumber</span>(<span class="literal">int</span> number) {
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System.<span class="ST1">out</span>.println(<span class="string">"</span><span class="string">INT (cube) was called</span><span class="string">"</span>);
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<span class="literal">return</span> number * StaticMethods.<span class="ST3">squareNumber</span>(number);
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}
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<span class="literal">public</span> <span class="literal">static</span> <span class="literal">double</span> <span class="ST2">cubeNumber</span>(<span class="literal">double</span> number) {
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System.<span class="ST1">out</span>.println(<span class="string">"</span><span class="string">DOUBLE (cube) was called</span><span class="string">"</span>);
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<span class="literal">return</span> number * StaticMethods.<span class="ST3">squareNumber</span>(number);
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}
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<span class="literal">public</span> <span class="literal">static</span> <span class="literal">char</span> <span class="ST2">menu</span>() {
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String s = <span class="string">""</span>;
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<span class="literal">do</span> {
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System.<span class="ST1">out</span>.println(<span class="string">"</span><span class="string">type S</span><span class="literal">\\</span><span class="string">s to square a number</span><span class="string">"</span>);
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System.<span class="ST1">out</span>.println(<span class="string">"</span><span class="string">type C</span><span class="literal">\\</span><span class="string">c to cube a number</span><span class="string">"</span>);
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System.<span class="ST1">out</span>.print(<span class="string">"</span><span class="string">Input: </span><span class="string">"</span>);
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s = <span class="literal">new</span> Scanner(System.<span class="ST1">in</span>).next();
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<span class="literal">if</span> (<span class="string">"</span><span class="string">c</span><span class="string">"</span>.compareToIgnoreCase(s) != <span class="number">0</span> && <span class="string">"</span><span class="string">s</span><span class="string">"</span>.compareToIgnoreCase(s) != <span class="number">0</span>) {
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System.<span class="ST1">out</span>.println(<span class="string">"</span><span class="literal">\t</span><span class="string">please enter a valid character</span><span class="string">"</span>);
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}
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} <span class="literal">while</span> (<span class="string">"</span><span class="string">c</span><span class="string">"</span>.compareToIgnoreCase(s) != <span class="number">0</span> && <span class="string">"</span><span class="string">s</span><span class="string">"</span>.compareToIgnoreCase(s) != <span class="number">0</span>);
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<span class="literal">return</span> s.toLowerCase().charAt(<span class="number">0</span>);
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}
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<span class="literal">public</span> <span class="literal">static</span> <span class="literal">int</span> <span class="ST2">menuInteger</span>() {
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Scanner input = <span class="literal">new</span> Scanner(System.<span class="ST1">in</span>);
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<span class="literal">int</span> returnInt = -<span class="number">1</span>;
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<span class="literal">while</span> (<span class="literal">true</span>) {
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System.<span class="ST1">out</span>.print(<span class="string">"</span><span class="string">Enter an integer (must be 1000, 2000, or 3000): </span><span class="string">"</span>);
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returnInt = input.nextInt();
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<span class="literal">if</span> (returnInt == <span class="number">1000</span>){
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<span class="literal">return</span> returnInt;
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}
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<span class="literal">else</span> <span class="literal">if</span> (returnInt == <span class="number">2000</span>) {
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<span class="literal">return</span> returnInt;
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}
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<span class="literal">else</span> <span class="literal">if</span> (returnInt == <span class="number">3000</span>) {
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<span class="literal">return</span> returnInt;
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}
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<span class="literal">else</span> {
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System.<span class="ST1">out</span>.println(<span class="string">"</span><span class="string">Integer not allowed, try again</span><span class="string">"</span>);
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}
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}
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}
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<span class="literal">public</span> <span class="literal">static</span> <span class="literal">double</span> <span class="ST2">area</span>(<span class="literal">int</span> n, <span class="literal">double</span> side) {
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<span class="comment">// Compute area</span>
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<span class="literal">return</span> (n * Math.<span class="ST3">pow</span>(side, <span class="number">2</span>)) / (<span class="number">4.0</span> * Math.<span class="ST3">tan</span>(Math.<span class="ST1">PI</span> / n));
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}
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}
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</pre></body>
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</html>
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@ -0,0 +1,20 @@
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/*
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||||
* Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
|
||||
* Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
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||||
*/
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package com.mycompany.mavenproject1;
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/**
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*
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* @author caleb
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*/
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public class BitwiseOR {
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public static void main(String[] args) {
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int x = 1;
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int y = 5;
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while (y-- > 0 ^ x++ < 100);
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System.out.println(++x);
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}
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}
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@ -0,0 +1,34 @@
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/*
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||||
* Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
|
||||
* Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
|
||||
*/
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package com.mycompany.mavenproject1;
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import java.util.Scanner;
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/**
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*
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* @author caleb
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*/
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public class MathRounding {
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public static void main(String[] args) {
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Scanner scan = new Scanner(System.in);
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double toRound = 1;
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while (toRound != 0)
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{
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System.out.println("Time to find out what this shit does: (hit 0 to fuck off) ");
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toRound = scan.nextDouble();
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if (toRound == 0)
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break;
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System.out.println("Math.rint gives you " + Math.rint(toRound));
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System.out.println("Math.ceil gives you " + Math.ceil(toRound));
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System.out.println("Math.round gives you " + Math.round(toRound));
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||||
System.out.println("Math.floor gives you " + Math.floor(toRound));
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}
|
||||
System.out.println("Goodbye!");
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,16 @@
|
||||
/*
|
||||
* Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
|
||||
* Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
|
||||
*/
|
||||
package com.mycompany.mavenproject1;
|
||||
|
||||
/**
|
||||
*
|
||||
* @author caleb
|
||||
*/
|
||||
public class NegativeChar {
|
||||
public static void main(String[] args) {
|
||||
char lolChar = '\5';
|
||||
System.out.println(lolChar);
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,28 @@
|
||||
/*
|
||||
* Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
|
||||
* Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
|
||||
*/
|
||||
package com.mycompany.mavenproject1;
|
||||
|
||||
/**
|
||||
*
|
||||
* @author caleb
|
||||
*/
|
||||
public class Q20 {
|
||||
public static void main(String[] args) {
|
||||
int x = 0;
|
||||
int y = 10;
|
||||
while ( -x > -5)
|
||||
{
|
||||
while ( y % 5 == 0 )
|
||||
{
|
||||
|
||||
y -= 5;
|
||||
if ( y < 0 )
|
||||
break;
|
||||
}
|
||||
x++;
|
||||
}
|
||||
System.out.println(x+y);
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,16 @@
|
||||
/*
|
||||
* Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
|
||||
* Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
|
||||
*/
|
||||
package com.mycompany.mavenproject1;
|
||||
|
||||
/**
|
||||
*
|
||||
* @author caleb
|
||||
*/
|
||||
public class Rint {
|
||||
public static void main(String[] args) {
|
||||
System.out.println( Math.rint(5.5) );
|
||||
System.out.println( Math.rint(4.5) );
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,16 @@
|
||||
/*
|
||||
* Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
|
||||
* Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
|
||||
*/
|
||||
package com.mycompany.mavenproject1;
|
||||
|
||||
/**
|
||||
*
|
||||
* @author caleb
|
||||
*/
|
||||
public class WeirdCharStuff {
|
||||
public static void main(String[] args) {
|
||||
char c = '2' + 2;
|
||||
System.out.println((int) c + 4);
|
||||
}
|
||||
}
|
||||
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Loading…
Reference in New Issue