有一个名称为Demo.java的文件,下面哪个是正确的类声明:
protected class Demo{ private int x = 0; private Demo (int xval){ x=xval; } }
public class demo{ public int x = 0; public demo (int x){ this.x=x; } }
public class Demo extends MyBaseClass, MyOtherBaseClass{ public int x = 0; public Demo(int xval){ x=xval; } }
public class Demo{ public int x = 0; public Demo (int x){ this.x=x; } }