package first; /* * 纯随机数发生器 * 生成1000个随机整数 */ public class TestRandom { public static void main(String[] args) { // TODO Auto-generated method stub long seed = System.currentTimeMillis();// 种子 int i; int count = 0; // Modulus=231-1=int.MaxValue // Multiplier=75=16807 long random = (16807 * seed) % Integer.MAX_VALUE; for (i = 1; i <= 1000; i++) { random = (16807 * random) % Integer.MAX_VALUE; System.out.print(random + " "); count++; if (count % 5 == 0) System.out.println(); } } }
动手动脑二
package first; public class MethodOverload { public static void main(String[] args) { System.out.println("The square of integer 7 is " + square(7)); System.out.println(" The square of double 7.5 is " + square(7.5)); } public static int square(int x) { return x * x; } public static double square(double y) { return y * y; } }