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這是java SE中隨機函數的示例,隨機生成雙色球
代碼如下:
/**隨機雙色球程序**/
package com.itjob.shuangseqiu;
import java.util.Arrays;
import java.util.Random;
public class ShuangSeQiu {
public static void main(String[] args) {
int[] redBall = new int[6];
int blueBall = 0;
Random rand = new Random();
//1個籃球1~16
blueBall = rand.nextInt(16) + 1;
//6個紅球 1~33,並且不能重複
for (int i = 0; i < redBall.length; i++) {
redBall[i] = rand.nextInt(33) + 1;
for (int j = 0; j < i; j++) {
if (redBall[j] == redBall[i]) {//判斷重複
i--;
break;
}
}
}
Arrays.sort(redBall);//排序
//輸出,當小於10的時候,輸出"0" + redBall
System.out.println("隨機產生的6個紅球爲");
for(int i = 0; i < 6; i++){
if (redBall[i] < 10) {
System.out.print("0" + redBall[i] + " ");
}else {
System.out.print(redBall[i] + " ");
}
}
System.out.println("\n隨機產生的6個紅球爲");
if (blueBall < 10) {
System.out.print("0" + blueBall + " ");
}else {
System.out.print(blueBall + " ");
}
}
}