public class test2 { public String user = "test2";
public test2() { }
public String getUser(){ System.out.println(this.user); //这里打印的为什么是"test2"，而不是"test4" user = getPassword(); //这里执行的为什么是test3的方法，而不是本身定义的方法呢 return user; } public String getPassword(){ System.out.println(this.user); return "hello test2"; }}
public class test3 extends test2{ public String user = "test3"; public test3() { }
public String getPassword(){ System.out.println(this.user); return "hello test3"; }}
public class test4 extends test3{ public String user = "test4"; public test4() { } public static void main(String[] args){ test4 t4 = new test4(); t4.getUse
