Java中的其他类无法调用方法

Question

1. When using Windows cmd (and Notepad++) i am able to call methods from other classes if they are all in default package

2. However, I am unable to do so if i define classes in any package other than default package.

3. Am facing this problem in NetBeans and Eclipse as well

Any help is appreciated

Answer 1

If you are defining class in package-A, it must be public , if you want to use it in package-B

package package-A;
public class A{
    public void hello();
}

package package-B;
public class B{
    public static void main(String[] args){
        A a = new A();
        a.hello();
    }

}

Because by-default access-modifier is default , so it will be accessable in that particular package only.

To learn more about access modifiers: Click Here