utilstest.java

来自「java learn PPT java learn PPT java learn」· Java 代码 · 共 39 行

     import java.util.*;

     import magic.util.*;
     
     public class UtilsTest 
     {
          public static void main(String[] args)
          {
               long time;
               Random r;
               int n;

               r = new Random(200);
               time = System.currentTimeMillis();              
               for(int i = 0; i < 10000000; i++)
               {
                    n = r.nextInt();
                    Math.sin(Math.toRadians(n));
                    Math.cos(Math.toRadians(n));
                    Math.tan(Math.toRadians(n));
               }
               System.out.println("It took " + (System.currentTimeMillis() - time) + 
                                  " ms using java.lang.Math...");


               r = new Random(200);
               time = System.currentTimeMillis();              
               for(int i = 0; i < 10000000; i++)
               {
                    n = r.nextInt();
                    MagicUtils.sin(n);
                    MagicUtils.cos(n);
                    MagicUtils.tan(n);
               }
               System.out.println("But only " + (System.currentTimeMillis() - time) + 
                                  " ms using MagicUtils! (including table build time)");
          }

     }    // UtilsTest