01-方法 动手动脑

import java.util.*;

public class Random {
    public static void main( String [] args ){
        Random rand = new Random();
        Scanner in = new Scanner( System.in );
        int number;
        System.out.println("请输入生成的随机数数量");
        number = in.nextInt();
        for( int i=0; i<number; i++){
            System.out.println(rand.nextInt());
        }
    }
}

// MethodOverload.java
// Using overloaded methods

public class MethodOverload {

    public static void main(String[] args) {
        System.out.println("The square of integer 7 is " + square(7));
        System.out.println("\nThe square of double 7.5 is " + square(7.5));
    }

    public static int square(int x) {
        return x * x;
    }

    public static double square(double y) {
        return y * y;
    }
}