继承中的构造方法

public class TestSuperSub {
	public  static void main(String args[]) {
	//SubClass sc1 = new SubClass();
	SubClass sc2 = new SubClass(400);
	
	}
}

class SuperClass {
		private int n;
		
		SuperClass() {
			System.out.println("SuperClass()");
		}
		

		SuperClass(int n) {
			System.out.println("SuperClass("+ n +")");
			this.n = n;
		}
}

class SubClass extends SuperClass {
		private int n;
		
		SubClass(int n) {
			System.out.println("SubClass(" + n + ")");
			this.n = n;
		}
		
		SubClass() {
			super(300);
			System.out.println("SubClass()");
			
		}
}