/**
* @Title: randomUtil.java
* @Package org.csun.nc.util
* @Description: TODO
* @author chisj chisj@foxmail.com
* @date 2017年5月7日
*/
package org.csun.nc.util;
import java.util.Random;
/**
* ClassName: randomUtil
* @Description: 随机数工具类
* @author chisj chisj@foxmail.com
* @date 2017年5月7日
*/
public class randomUtil {
//方法1
public static int nextInt1(final int min, final int max) {
Random rand= new Random();
int tmp = Math.abs(rand.nextInt());
return (tmp % (max - min + 1) + min);
}
//方法2：不会生成小于100000的数
public static int nextInt2() {
Random random = new Random();
int x = random.nextInt(899999);
//int x = x+100000;
return x;
}
//方法3
public static int nextInt3() {
int n = 0 ;
while (n < 100000) {
n = (int)(Math.random()*1000000);
}
//System.out.println(n);
return n;
}
//方法4
public static int nextInt4() {
String str = "";
str += (int)(Math.random()*9+1);
for(int i = 0; i < 5; i++){
str += (int)(Math.random()*10);
}
int num = Integer.parseInt(str);
//System.out.println(num);
return num;
}
//方法5
//System.out.println((int)((Math.random()*9+1)*100000));
//方法6
public static String nextInt6() {
Random random = new Random();
String result="";
for(int i=0;i<6;i++){
result+=random.nextInt(10);
}
//System.out.print(result);
return result;
}
}
