testnullpointerexception.java

来自「由浅入深的介绍JAVAse的基本编程思想」· Java 代码 · 共 12 行

class Person{
	public int age;
}

public class TestNullPointerException{
	public static void main(String[] args) {
		Person p = null;
		System.out.println(p.age);
	}
}