Java 随机数问题

public class rand {

private Random random = new Random();

private int n = 0;

public void printRandom (){
Scanner input=new Scanner(System.in);
System.out.println("输入一个正整数");
this.n = input.nextInt();

for( int i=0;i System.out.print(random.nextInt(10000)+ " ");
}
}

public static void main(String args[]){

rand t = new rand();
t.printRandom();
}
}

生成从10到20的随机数：

// rand.java
import java.util.Scanner;

public class rand {
private static final int MIN = 10;
private static final int MAX = 20;

public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("输入个数: ");
int n = input.nextInt();
for (int i = 0; i < n; i++) {
System.out.println((int) ((MAX - MIN + 1) * Math.random() + MIN));
}
}

}

试一下看行不，我徒手写的。

import java.util.*;
import java.util.Random;

public class RandomTest {

public static void main (String args[]) {
int num = System.in.read();
Random random =new java.util.Random(25);
for (int i = 0; i System.out.println("i = %d",random.nextInt());
}

}
}

随机数的范围说一下