testthis.java

有关于java中的继承

public class TestThis{
	public static void main(String[] args){
		/*
		MyClass m1=new MyClass(10);
		MyClass m2=new MyClass(20);
		m1.print();
		m2.print();
		*/
		new MyClassB(10);
	}
}
class MyClass{
	int a;
	public MyClass(int a){
		this.a=a;
	}
	public void print(){
		int a=30;
		System.out.println(a);
		System.out.println(this.a);
	}
}
class MyClassB{
	public MyClassB(){
		System.out.println("MyClassB()");
	}
	public MyClassB(int a){
		this();
		System.out.println("MyClassB(int)");
	}
}