ex_5_6_2.java

来自「JAVA程序设计与实践.rar」· Java 代码 · 共 47 行

/*
*文件名:ex_5_6_2.java
*说  明:访问控制演示
*/
package p2;

class Derived extends p1.Original
{
	void Access( )
	{
		System.out.println("**** In subClass of another package, you can access member of this class ...");
		// System.out.println("friendly member "+n_friendly);
		// System.out.println("private member "+n_private);
		System.out.println("protected member "+n_protected);
		System.out.println("public member "+n_public);
		p1.Original o = new p1.Original( );
		System.out.println("**** In subClass of another package, you can access member of superclass object ...");
		// System.out.println("friendly member "+o.n_friendly);
		// System.out.println("private member "+o.n_private);
		// System.out.println("protected member "+o.n_protected);
		System.out.println("public member "+o.n_public);
	}
}

class AnotherPackage
{
	void Access( )
	{
		p1.Original o = new p1.Original( );
		System.out.println("**** In another package, you can access ...");
		// System.out.println("friendly member "+o.n_friendly);
		// System.out.println("private member "+o.n_private);
		// System.out.println("protected member "+o.n_protected);
		System.out.println("public member "+o.n_public);
	}
}

class AccessControl
{
	public static void main( String args[ ] )
	{
		Derived d = new Derived( );
		d.Access( );
		AnotherPackage a = new AnotherPackage( );
		a.Access( );
	}
}