java生成随机整数总结

import java.security.SecureRandom;
import java.util.Random;
/**
* aiguoxin 2010-10-20下午01:35:13
*
* 随机数产生总结
*/
public class Radom {
public static void main(String[] args) {
// Math.random()方法
for (int i = 0; i < 10; i++) {
System.out.print((int)(Math.random()*100) + " ");
}		System.out.println("/n" + "-----------------------------");
// 不带种子，每次的随机数不同
Random rand = new Random();
for (int i = 0; i < 10; i++) {
System.out.print(rand.nextInt(100) + " ");
}
System.out.println("/n" + "-----------------------------");
// 带种子，每次的随机数相同
Random rand2 = new Random(10);
for (int i = 0; i < 10; i++) {
System.out.print(rand2.nextInt(100) + " ");
}
System.out.println("/n" + "-----------------------------");
// 生成完全不重复的随机数
SecureRandom random = new SecureRandom();
for (int i = 0; i < 10; i++) {
System.out.print(random.nextInt(100) + " ");
}
}
}