package com.chase.abstrac;

/**

 * 接口

 * @author Chase

 *

 * @date 2013-10-21 下午02:29:12

 *

 * @version V1.0

 */

public interface TestIntface {

    void test1();//方法1

    void test2();//方法2

    void test3();//方法3

}

package com.chase.abstrac;

/**

 * 实现TestIntface接口的 抽象类

 * @author Chase

 *

 * @date 2013-10-21 下午02:29:57

 *

 * @version V1.0

 */

public abstract class TestAbstract implements TestIntface {

    public void test1(){System.err.println("我是test1");};

    public void test2(){};

    public void test3(){System.err.println("我是test3");}

}

package com.chase.abstrac;

/**

 * 继承 实现TestIntface接口的 抽象类 的 子类

 * @author Chase

 *

 * @date 2013-10-21 下午02:31:04

 *

 * @version V1.0

 */

public class TestExtendsAbstract extends TestAbstract {

    public void test3() {

        System.out.println("test3()");

    }

}

package com.chase.abstrac;

/**

 * 程序入口类

 * @author Chase

 *

 * @date 2013-10-21 下午02:32:14

 *

 * @version V1.0

 */

public class TestMain {

    static TestIntface intface = new TestExtendsAbstract();

    public static void main(String[] args) {

        intface.test3();

        intface.test1();

    }

}

运行结果：
aaarticlea/png;base64,iVBORw0KGgoAAAANSUhEUgAAAfsAAACJCAIAAACkdAb7AAAE0UlEQVR4nO3dMXLTTACG4b1VZuACugMFwx1U0ZDhEFQiLSUlMzQqaFJS0Oco+gsSW7JWiq3gxPm/55kdJqPI6zjA681aScqf37fX19dfv/36+u3Xn9+3xhnHj49v33z8+VL39Zz3PhnfP7+5+vxj222/fCjvbjbfdfeuvP/y7I/3PI9lacLuXXmZv9bn/1S8msf789PVJf3Dm4zyR/Gfbfz4+LaUUspz/Gu4jOL//HRVSillc/Fvb96ffNub9+XBvy3sU8eGx7I6vjRP+9w+5a4/lAOnfRibPhUv+HhPHd8/v3mW/+anD8U3DMNIGZPiXwPw/zUp/vBKlFJe+kMAeH0UHyCF4gOkUHyAFIoPkOIFin/XNfeX8DZd9YSuabq70dmz0xQfYINK8bum7f/F1NV5+nYf+rtJ2kdnTG83O6D4AFtMi79fft/bp7Zv90eni+79bZrmfj2+Ms9ItfhdMzt5tsxXfIANjlzjT9bZd11TXaeP1+8L8+xPXNjVmS/o/x6cPDUoPsAGxxV/vMA/XLWP3ze54aO7Q4chH/4+mVRudXBU8QE2OLr4x+zt9+1xa/zRDQ6W+YoPcDbV4j+svPt2t2yvl/jguprpE8Oj84wO79jVATiX2tWZ+32acXwPdnb2BV98gfbReWpXZ3rlFuBMLu87sFydCXAel1d834EFcB6XWPxHKT7ABooPkOK44m8orCgDXJjl4pdyP4Zh8md9mlIfAFyMWfGrvd69vRTx+XG5B7gwq2v8+dsrxbfAB7hsq2v84/dqrPEBLt6Ja/zFaS5jjd+WoZRh/jP3AfhnuzqL00/Pb9oNH2JFdZ6uGdp+6FvFB6g65VqdYfY0cOQYhuGuOzzYP8zTt/uDB99e2+yON8PD71pZnGc3m+ID1CwUv3qtzjEX6qx/EVBZm/dDGR3smn30u2bf7nb6ZLDytYLiAyyYFr+6rr8/cfVi/PHbK7v581KPF/j3Y3dOXzu4MM94QsUHqDl6H39lIT9+76lr/L4djvtdK9b4AE/0WPGrNV95UfeR4jfD3TAMf5f2D9VuZnvxBycPsyeG6jy7MxUfoKZW/JV2r7yQO8y+FJjb7+GMM93Xd3Wa6lbP8jztdHeo9utWAJItv3K7eIuFjf6DE172wnwAZl7lT0sGYAPFB0ih+AApFB8gheIDpFB8gBSKD5BC8QFSKD5ACsUHSKH4ACkUHyCF4gOkUHyAFIoPkELxAVIoPkAKxQdIofgAKRQfIIXiA6RQfIAUig+QQvEBUig+QArFB0ih+AApFB8gheIDpFB8gBSKD5BC8QFSKD5ACsUHSKH4ACkUHyCF4gOkUHyAFIoPkELxAVIoPkAKxQdIofgAKRQfIIXiA6RQfIAUig+QQvEBUig+QArFB0ih+AApFB8gheIDpFB8gBSKD5BC8QFSKD5ACsUHSKH4ACkUHyCF4gOkUHyAFIoPkELxAVIoPkAKxQdIofgAKRQfIIXiA6RQfIAUig+QQvEBUig+QArFB0ih+AApFB8gheIDpFB8gBSKD5BC8QFSKD5ACsUHSKH4ACkUHyCF4gOkUHyAFIoPkELxAVIoPkAKxQdIofgAKRQfIIXiA6RQfIAUig+QQvEBUig+QArFB0ih+AApFB8gheIDpFB8gBT/AWDxWLNbT47nAAAAAElFTkSuQmCC" alt="" />