java课后作业2

动手动脑

编写一个方法，使用以上算法生成指定数目（比如1000个）的随机整数

 

import java.util.Random;
import java.util.Scanner;
public class Make {
      public static void main(String[] args){
             Random rand=new Random();
             Scanner scan = new Scanner(System.in);
             int n;
             n = scan.nextInt();
             int x=rand.nextInt(100);
             for(int i=1;i<=n;i++)
             {
              x=(int) ((7^5*x+0)%(Math.pow(2,31)));
              System.out.print(x+" ");
              if(i%10==0)
               System.out.println();
             }
    }
}

 

结果

10
293 1470 7345 36722 183613 918070 4590345 22951722 114758613 573793070

 

 

方法重载

// 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;
 　　}
}

 

 结果

The square of integer 7 is 49

The square of double 7.5 is 56.25