alpha.java

java tutotrials or beginners

/*
 * Copyright (c) 1995 - 2008 Sun Microsystems, Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Sun Microsystems nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */ 

package one;

public class Alpha {

    //member variables
    private   int privateVariable = 1;
              int packageVariable = 2;  //default access
    protected int protectedVariable = 3;
    public    int publicVariable = 4;

    //methods
    private void privateMethod() {
        System.out.format("privateMethod called%n");
    }
    void packageMethod() { //default access
        System.out.format("packageMethod called%n");
    }
    protected void protectedMethod() {
        System.out.format("protectedMethod called%n");
    }
    public void publicMethod() {
        System.out.format("publicMethod called%n");
    }

    public static void main(String[] args) {
        Alpha a = new Alpha();
        a.privateMethod();   //legal
        a.packageMethod();   //legal
        a.protectedMethod(); //legal
        a.publicMethod();    //legal

        System.out.format("privateVariable: %2d%n",
            a.privateVariable);    //legal
        System.out.format("packageVariable: %2d%n",
            a.packageVariable);    //legal
        System.out.format("protectedVariable: %2d%n",
            a.protectedVariable); //legal
        System.out.format("publicVariable: %2d%n",
            a.publicVariable);     //legal
    }
}