testaddition.java

项目实战

abstract class addition{
	int num;
	int num1;
	String textobj;
	String textobj1;
	addition(){
	}
	addition(int no,int no1){
		num=no;
		num1=no1;
	}
	addition(String strobj,String strobj1){
		textobj=strobj;
		textobj1=strobj1;
	}
	abstract void add();
}
class numberaddition extends addition{
	numberaddition(){
	}
	numberaddition(int no,int no1){
		super(no,no1);
	}
	void add(){
		System.out.println("\n---------------------------");
		System.out.println("相加值");
		System.out.println("---------------------------");
		System.out.println("\n两个数字为:"+num+"和"+num1);
		System.out.println("\n相加后输出结果为:"+(num+num1));
	}
}
class textconcatenation extends addition{
	textconcatenation(){
	}
	textconcatenation(String strobj,String strobj1){
		super(strobj,strobj1);
	}
	void add(){
		System.out.println("\n---------------------------");
		System.out.println("连接值");
		System.out.println("---------------------------");
		System.out.println("\n两个字符串为:"+textobj+"和"+textobj1);
		System.out.println("连接后输出结果为:"+textobj+""+textobj1);
		System.out.println();
	}
}
public class testaddition{
	testaddition(){
	}
	public static void main(String[] args){
		numberaddition numobj=new numberaddition(65,67);
		numobj.add();
		textconcatenation textobj=new textconcatenation("Hello","Mike!");
		textobj.add();
	}
}