java 笔试题

public class DD {
	
	public static void main(String[] args) {
		
		new Carrier(2);
	}

}
class Carrier{
	public static C c1 = new C(1);
	public  C c2 = new C(3);
	public Carrier(int number) {
		new C(number);
	}
	
}

class C{
	
	public C(int number){
		
		System.out.println(number);
	}

输出
1
3
2

public class FinallyAndReturn {

	public static void main(String[] args) {

		System.out.println(getVal());
	}

	public static int getVal() {

		int i = 0;
		try {
			return i;
		} finally {
			i = 1;

		}
	}
}

输出0

public class SuperC {

	public SuperC() {
		printOut();
	}
	public void printOut() {
		System.out.println("Super print out");
	}
	public static void main(String[] args) {
		new SubC();
	}
}

class SubC extends SuperC{
	
	public SubC() {
		printOut();
	}

	public void printOut() {
		System.out.println("Sub print out");
	}
}

输出
Sub print out
Sub print out

public class SuperC {

	public SuperC() {
		printOut();
	}
	private void printOut() {
		System.out.println("Super print out");
	}
	public static void main(String[] args) {
		new SubC();
	}
}

class SubC extends SuperC{
	
	public SubC() {
		printOut();
	}

	public void printOut() {
		System.out.println("Sub print out");
	}
}

输出
Super print out
Sub print out