Java 简单计算器程序实现：Number 类示例

public class Number {
    private int n1;
    private int n2;

    public int getN1() {
        return n1;
    }

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

    public int getN2() {
        return n2;
    }

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

    public int addition() {
        return n1 + n2;
    }

    public int subtraction() {
        return n1 - n2;
    }

    public int multiplication() {
        return n1 * n2;
    }

    public double division() {
        if (n2 == 0) {
            System.out.println('Error: Division by zero');
            return 0;
        }
        return (double) n1 / n2;
    }

    public static void main(String[] args) {
        Number number = new Number();
        number.setN1(10);
        number.setN2(5);

        System.out.println('Addition: ' + number.addition());
        System.out.println('Subtraction: ' + number.subtraction());
        System.out.println('Multiplication: ' + number.multiplication());
        System.out.println('Division: ' + number.division());
    }
}

运行结果：

Addition: 15
Subtraction: 5
Multiplication: 50
Division: 2.0