java0007——继承与多态实例01四则运算程序

1. 流程图
   
2. 代码
   FatherOfComputation.java 抽象父类

package duotaiProject01_computation;
public abstract class  FatherOfComputation {//模板抽象类
	int num1;
	int num2;
	public abstract int operate();
	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 FatherOfComputation(){
		super();
	}
	public FatherOfComputation(int num1,int num2) {
		super();
		this.num1=num1;
		this.num2=num2;
	}
}

• 加法

package duotaiProject01_computation;
public class Add extends FatherOfComputation{
	@Override
	public int operate() {
		return super.getNum1()+super.getNum2();
	}
	public Add() {
		super(1,1);
	}
	public Add(int num1,int num2) {
		super(num1,num2);
	}
}

• 减法

package duotaiProject01_computation;
public class Sub extends FatherOfComputation {
	@Override
	public int operate() {
		return super.getNum1()-super.getNum2();
	}
	public Sub() {
		super(1,1);
	}
	public Sub(int num1,int num2) {
		super(num1,num2);
	}
}

• 乘法

package duotaiProject01_computation;

public class Multiple extends FatherOfComputation {
	@Override
	public int operate() {
		return super.getNum1()*super.getNum2();
	}
	public Multiple() {
		super(1,1);
	}
	public Multiple(int num1,int num2) {
		super(num1,num2);
	}
}

• 除法

package duotaiProject01_computation;
public class Division extends FatherOfComputation {
   @Override
   public int operate() {
   	return super.getNum1()/super.getNum2();
   }
   public Division() {
   	super(1,1);
   }
   public Division(int num1,int num2) {
   	super(num1,num2);
   }