69 lines
4.8 KiB
HTML
69 lines
4.8 KiB
HTML
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<title>ToDecimal.java</title>
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<table width="100%"><tr><td align="center">/home/caleb/ASDV-Java/Semester 2/Assignments/lab6-Exceptions_CalebFontenot/src/main/java/com/mycompany/lab6/exceptions_calebfontenot/ToDecimal.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 nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license</span>
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<span class="comment"> * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template</span>
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<span class="comment"> */</span>
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<span class="literal">package</span> com.mycompany.lab6.exceptions_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="ST0">@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> ToDecimal {
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<span class="literal">public</span> <span class="literal">static</span> <span class="literal">int</span> hexToDecimal(String hex) {
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<span class="literal">int</span> decimalValue =<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 < hex.length(); ++i) {
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<span class="literal">char</span> hexChar = hex.charAt(i);
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decimalValue = decimalValue * <span class="number">16</span> + hexCharToDecimal(hexChar);
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}
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<span class="literal">return</span> decimalValue;
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}
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<span class="literal">public</span> <span class="literal">static</span> <span class="literal">int</span> hexCharToDecimal(<span class="literal">char</span> ch) {
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ch = Character.toUpperCase(ch);
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<span class="literal">if</span> (ch >= <span class="string">'</span><span class="string">A</span><span class="string">'</span> && ch <= <span class="string">'</span><span class="string">F</span><span class="string">'</span>) {
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<span class="literal">return</span> <span class="number">10</span> + ch - <span class="string">'</span><span class="string">A</span><span class="string">'</span>;
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} <span class="literal">else</span> <span class="literal">if</span> (ch >= <span class="string">'</span><span class="string">0</span><span class="string">'</span> && ch <= <span class="string">'</span><span class="string">9</span><span class="string">'</span>){ <span class="comment">// ch is '0', '1', or '9'</span>
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<span class="literal">return</span> ch - <span class="string">'</span><span class="string">0</span><span class="string">'</span>;
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} <span class="literal">else</span> {
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<span class="literal">throw</span> <span class="literal">new</span> NumberFormatException(<span class="string">"</span><span class="string">Invalid hex character</span><span class="string">"</span>);
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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">void</span> main(String[] args) {
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Scanner input = <span class="literal">new</span> Scanner(System.in);
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System.out.print(<span class="string">"</span><span class="string">Enter a hex number or q/Q to quit: </span><span class="string">"</span>);
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String hex = input.nextLine();
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<span class="literal">while</span> (<span class="string">"</span><span class="string">q</span><span class="string">"</span>.equals(hex.toLowerCase()) == <span class="literal">false</span>) {
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System.out.println(<span class="string">"</span><span class="string">The decimal value for hex number </span><span class="string">"</span> + hex + <span class="string">"</span><span class="string"> is </span><span class="string">"</span> + hexToDecimal(hex.toUpperCase()));
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System.out.print(<span class="string">"</span><span class="string">Emter a hex number: </span><span class="string">"</span>);
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hex = input.nextLine();
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}
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}
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}
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</pre></body>
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