public class A{ public static void main(String[] args){ A a = new A(); } }
A a = new A() //类A实例了一个对象a
public class A{ private int value; public A(int value){ this.value=value; System.out.println(this.value); }public static void main(String[] args){ A a=new A(); } }
上面代码错了,呵呵。 public class A{ private int value; public A(int value){ this.value=value; System.out.println(this.value); }public static void main(String[] args){ A a=new A(2); } }
这样呢? public class A{public A(String arg) {....}public static void main(String[] args){ A a = new A("arg"); } }
public static void main(String[] args){
A a = new A();
}
}
public class A{
private int value;
public A(int value){
this.value=value;
System.out.println(this.value);
}public static void main(String[] args){
A a=new A();
}
}
public class A{
private int value;
public A(int value){
this.value=value;
System.out.println(this.value);
}public static void main(String[] args){
A a=new A(2);
}
}
public class A{public A(String arg) {....}public static void main(String[] args){
A a = new A("arg");
}
}