package JavaBean; public class Javabean { private int num1; private int num2; public int getNum1() { return num1; } public void setNum1(int num1) { this.num1 = num1; } public int getNum2() { return num2; } public void setNum2(int num2) { this.num2 = num2; } public int add(){ return (num1+num2); } } 加法计算器

加法计算器

first number:

second number:

show+=