Question

编写一个应用程序，定义2个整型变量n1,n2并赋给任意值。计算输出n1>n2,n1<n2,n1-n2>=0,n1%n2==0的值。

我是要自学JAVA，所以要完整的过程。为了学习流程控制语句

Answer 1

import java.lang.System;
import java.util.Random;

/**
 * 枚举用法详解
 * 
 * @author Lingo
 * @version 1.0
 * 
 */
public class Test{
	public static void main(String[] args)
	{
		//随机获得n1,n2的值，范围在0~100之间
		Random n = new Random();
		int n1 = n.nextInt(100);
		int n2 = n.nextInt(100);
		
		System.out.println("n1 = " + n1 + ", n2 = " + n2);
		
		//打印n1 > n2（其它几个如下打印即可）0的值。Boolean类型的值：
		//System.out.println(需要打印的判断语句);
		System.out.println(n1 > n2);
		
		if (n1 > n2)
			System.out.println("n1>n2");
		else if (n1 < n2)
			System.out.println("n1<n2");
		else
			System.out.println("n1=n2");
			
		if (n1 - n2 >= 0)
			System.out.println("n1-n2>=0");
		else
			System.out.println("n1-n2<0");

		if (n1 % n2 == 0)
			System.out.println("n1%n2=0");
		else
			System.out.println("n1%n2=" + (n1 % n2));
			
	}
}

结果：
n1 = 53, n2 = 72
false
n1<n2
n1-n2<0
n1%n2=53

Answer 2

public class Number {

private Integer n1;
private Integer n2;

/** 构造方法 */
public Number(Integer n1, Integer n2) {
super();
this.n1 = n1;
this.n2 = n2;
}

/** 加 */
public Integer addition() {
System.out.println(this.n1 + this.n2);
return this.n1 + this.n2;
}

/** 减 */
public Integer subtration() {
System.out.println(this.n1 - this.n2);
return this.n1 - this.n2;
}

/** 乘 */
public Integer multiplication() {
System.out.println(this.n1 * this.n2);
return this.n1 * this.n2;
}

/** 除 */
public Integer division() {
System.out.println(this.n1 / this.n2);
return this.n1 / this.n2;
}

public Integer getN1() {
return n1;
}

public void setN1(Integer n1) {
this.n1 = n1;
}

public Integer getN2() {
return n2;
}

public void setN2(Integer n2) {
this.n2 = n2;
}
}

public static void main(String[] args) {
Number number = new Number(1, 2);
number.addition();
number.subtration();
number.multiplication();
number.division();
}