java程序：产生随机数

import java.util.Scanner;
public class MathGame {
public static void main(String[] args){
int number1=(int)( Math.random()10);
int number2=(int)(Math.random()10);
if(number1<number2){
int temp=number1;
number1=number2;
number2=temp;
}
System.out.println("what is "+number1+"-"+number2+" ?");
Scanner input = new Scanner(System.in);
int answer = input.nextInt();

        if(answer==number1-number2){        System.out.println("your answer is good!");        }         else{            System.out.println("your answer is false!");            System.out.println("the true answer is  "+(number1-number2));        }}

}
使用Math.random()方法来获得一个0.0到1.0之间的随机数。