一个演示继承关系的小程序

/** * Title:树继承 * Description:使用继承类，柳树就是树 * @author fan * */public class MyOsier extends MyTree{/** * 重写过树的树叶 */public void leaf(){super.leaf();String sShape = "长形";super.print("形状:"+sShape);}/** * 扩展树的花 */public void flower(){print("哈哈,柳树没有花");}/** * 主方法 * @param args */public static void main(String[] args){MyOsier o = new MyOsier();MyTree t = new MyTree();t.print("树的根");t.root();t.print("树的树干");t.bolo();t.print("树的树枝");t.branch();t.print("树的树叶");t.leaf();o.print("柳树的跟");o.root();o.print("柳树的树干");o.bolo();o.print("柳树的树枝");o.branch();o.print("柳树的树叶");o.leaf();o.print("柳树的花");o.flower();}}class MyTree{/** * 树的树根 */public void root(){String sSite = "土壤中";String sFunction = "吸收养分";print("位置："+sSite);print("功能:"+sFunction);}/** * 树的树干 */public void bolo(){String sSite = "地面";String sFunction = "传递养分";print("位置:"+sSite);print("功能:"+sFunction);}/** * 树的树枝 */public void branch(){String sSite = "树干上";String sFunction = "传递养分";print("位置:"+sSite);print("功能："+sFunction);}/** * 树的树叶 */public void leaf(){String sSite = "树梢";String sFunction = "光合作用";String sColor = "绿色";print("位置："+sSite);print("功能:"+sFunction);print("颜色:"+sColor);}/** * 打印信息 * @param opera 打印信息的内容 */public void print(Object opera){System.out.println(opera);}}

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