Java抽象类字段覆盖

它并没有覆盖任何内容，您只是在当前类范围内隐藏了原始字段。如果将变量与子类型一起使用，您仍然可以访问原始属性。例：

abstract class GenericContainer {    public GenericChild child;       }abstract class GenericChild {    public int prop1=1 ;}class SpecialChild extends GenericChild {    public int prop1=2;}class SpecialContainer extends GenericContainer {    public SpecialChild child;}public class Main {    public static void main( String ... args ) {        GenericContainer container = new SpecialContainer();        container.child = new SpecialChild();        System.out.println( container.child.prop1 );        SpecialChild child = (SpecialChild) container.child;     System.out.println( child.prop1 );    }}

先打印1，然后打印2。

从

SpecialChild

super

class SpecialChild extends GenericChild {    public int prop1=2;    public int getOriginalProp1() {        return super.prop1;    }}