\u5728 Java \u4e2d\uff0c\u5141\u8bb8\u5728\u4e00\u4e2a\u7c7b\uff08\u6216\u65b9\u6cd5\u3001\u8bed\u53e5\u5757\uff09\u7684\u5185\u90e8\u5b9a\u4e49\u53e6\u4e00\u4e2a\u7c7b\uff0c\u79f0\u4e3a\u5185\u90e8\u7c7b(Inner Class)\uff0c\u6709\u65f6\u4e5f\u79f0\u4e3a\u5d4c\u5957\u7c7b(Nested Class)\u3002<\/p>\n
\u5185\u90e8\u7c7b\u548c\u5916\u5c42\u5c01\u88c5\u5b83\u7684\u7c7b\u4e4b\u95f4\u5b58\u5728\u903b\u8f91\u4e0a\u7684\u6240\u5c5e\u5173\u7cfb\uff0c\u4e00\u822c\u53ea\u7528\u5728\u5b9a\u4e49\u5b83\u7684\u7c7b\u6216\u8bed\u53e5\u5757\u4e4b\u5185\uff0c\u5b9e\u73b0\u4e00\u4e9b\u6ca1\u6709\u901a\u7528\u610f\u4e49\u7684\u529f\u80fd\u903b\u8f91\uff0c\u5728\u5916\u90e8\u5f15\u7528\u5b83\u65f6\u5fc5\u987b\u7ed9\u51fa\u5b8c\u6574\u7684\u540d\u79f0\u3002
\n<\/p>\n
\u4f7f\u7528\u5185\u90e8\u7c7b\u7684\u4e3b\u8981\u539f\u56e0\u6709\uff1a
\n\u5185\u90e8\u7c7b\u53ef\u4ee5\u8bbf\u95ee\u5916\u90e8\u7c7b\u4e2d\u7684\u6570\u636e\uff0c\u5305\u62ec\u79c1\u6709\u7684\u6570\u636e\u3002
\n\u5185\u90e8\u7c7b\u53ef\u4ee5\u5bf9\u540c\u4e00\u4e2a\u5305\u4e2d\u7684\u5176\u4ed6\u7c7b\u9690\u85cf\u8d77\u6765\u3002
\n\u5f53\u60f3\u8981\u5b9a\u4e49\u4e00\u4e2a\u56de\u8c03\u51fd\u6570\u4e14\u4e0d\u60f3\u7f16\u5199\u5927\u91cf\u4ee3\u7801\u65f6\uff0c\u4f7f\u7528\u533f\u540d(anonymous)\u5185\u90e8\u7c7b\u6bd4\u8f83\u4fbf\u6377\u3002
\n\u51cf\u5c11\u7c7b\u7684\u547d\u540d\u51b2\u7a81\u3002<\/p>\n
\u8bf7\u770b\u4e0b\u9762\u7684\u4f8b\u5b50\uff1a
\n[java]public class Outer {
\n\u00a0\u00a0\u00a0 private int size;
\n\u00a0\u00a0\u00a0 public class Inner {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 private int counter = 10;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 public void doStuff() {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 size++;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0 public static void main(String args[]) {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Outer outer = new Outer();
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Inner inner = outer.new Inner();
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 inner.doStuff();
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println(outer.size);
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println(inner.counter);
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ \u7f16\u8bd1\u9519\u8bef\uff0c\u5916\u90e8\u7c7b\u4e0d\u80fd\u8bbf\u95ee\u5185\u90e8\u7c7b\u7684\u53d8\u91cf
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println(counter);
\n\u00a0\u00a0\u00a0 }
\n}[\/java]
\n\u8fd9\u6bb5\u4ee3\u7801\u5b9a\u4e49\u4e86\u4e00\u4e2a\u5916\u90e8\u7c7b Outer\uff0c\u5b83\u5305\u542b\u4e86\u4e00\u4e2a\u5185\u90e8\u7c7b Inner\u3002\u5c06\u9519\u8bef\u8bed\u53e5\u6ce8\u91ca\u6389\uff0c\u7f16\u8bd1\uff0c\u4f1a\u751f\u6210\u4e24\u4e2a .class \u6587\u4ef6\uff1aOuter.class \u548c Outer$Inner.class\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5185\u90e8\u7c7b\u4f1a\u88ab\u7f16\u8bd1\u6210\u72ec\u7acb\u7684\u5b57\u8282\u7801\u6587\u4ef6\u3002<\/p>\n
\u5185\u90e8\u7c7b\u662f\u4e00\u79cd\u7f16\u8bd1\u5668\u73b0\u8c61\uff0c\u4e0e\u865a\u62df\u673a\u65e0\u5173\u3002\u7f16\u8bd1\u5668\u5c06\u4f1a\u628a\u5185\u90e8\u7c7b\u7ffb\u8bd1\u6210\u7528 $ \u7b26\u53f7\u5206\u9694\u5916\u90e8\u7c7b\u540d\u4e0e\u5185\u90e8\u7c7b\u540d\u7684\u5e38\u89c4\u7c7b\u6587\u4ef6\uff0c\u800c\u865a\u62df\u673a\u5219\u5bf9\u6b64\u4e00\u65e0\u6240\u77e5\u3002<\/p>\n
\u6ce8\u610f\uff1a\u5fc5\u987b\u5148\u6709\u5916\u90e8\u7c7b\u7684\u5bf9\u8c61\u624d\u80fd\u751f\u6210\u5185\u90e8\u7c7b\u7684\u5bf9\u8c61\uff0c\u56e0\u4e3a\u5185\u90e8\u7c7b\u9700\u8981\u8bbf\u95ee\u5916\u90e8\u7c7b\u4e2d\u7684\u6210\u5458\u53d8\u91cf\uff0c\u6210\u5458\u53d8\u91cf\u5fc5\u987b\u5b9e\u4f8b\u5316\u624d\u6709\u610f\u4e49\u3002<\/p>\n
\u5185\u90e8\u7c7b\u5206\u7c7b:
\n\u5185\u90e8\u7c7b\u53ef\u4ee5\u662f\u9759\u6001(static)\u7684\uff0c\u53ef\u4ee5\u4f7f\u7528 public\u3001protected \u548c private \u8bbf\u95ee\u63a7\u5236\u7b26\uff0c\u800c\u5916\u90e8\u7c7b\u53ea\u80fd\u4f7f\u7528 public\uff0c\u6216\u8005\u9ed8\u8ba4\u3002
\n1.\u6210\u5458\u5f0f\u5185\u90e8\u7c7b<\/p>\n
\u5728\u5916\u90e8\u7c7b\u5185\u90e8\u76f4\u63a5\u5b9a\u4e49\uff08\u4e0d\u5728\u65b9\u6cd5\u5185\u90e8\u6216\u4ee3\u7801\u5757\u5185\u90e8\uff09\u7684\u7c7b\u5c31\u662f\u6210\u5458\u5f0f\u5185\u90e8\u7c7b\uff0c\u5b83\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\u5916\u90e8\u7c7b\u7684\u6240\u6709\u53d8\u91cf\u548c\u65b9\u6cd5\uff0c\u5373\u4f7f\u662f private \u7684\u3002\u5916\u90e8\u7c7b\u8981\u60f3\u8bbf\u95ee\u5185\u90e8\u7c7b\u7684\u6210\u5458\u53d8\u91cf\u548c\u65b9\u6cd5\uff0c\u5219\u9700\u8981\u901a\u8fc7\u5185\u90e8\u7c7b\u7684\u5bf9\u8c61\u6765\u83b7\u53d6\u3002<\/p>\n
\u8bf7\u770b\u4e0b\u9762\u7684\u4ee3\u7801\uff1a
\n[java]public class Outer{
\n\u00a0\u00a0\u00a0 private int size;
\n\u00a0\u00a0\u00a0 public class Inner {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 public void dostuff() {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 size++;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0 public void testTheInner() {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Inner in = new Inner();
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 in.dostuff();
\n\u00a0\u00a0\u00a0 }
\n}[\/java]
\n\u6210\u5458\u5f0f\u5185\u90e8\u7c7b\u5982\u540c\u5916\u90e8\u7c7b\u7684\u4e00\u4e2a\u666e\u901a\u6210\u5458\u3002<\/p>\n
\u6210\u5458\u5f0f\u5185\u90e8\u7c7b\u53ef\u4ee5\u4f7f\u7528\u5404\u79cd\u4fee\u9970\u7b26\uff0c\u5305\u62ec public\u3001protected\u3001private\u3001static\u3001final \u548c abstract\uff0c\u4e5f\u53ef\u4ee5\u4e0d\u5199\u3002<\/p>\n
\u82e5\u6709 static \u4fee\u9970\u7b26\uff0c\u5c31\u4e3a\u7c7b\u7ea7\uff0c\u5426\u5219\u4e3a\u5bf9\u8c61\u7ea7\u3002\u7c7b\u7ea7\u53ef\u4ee5\u901a\u8fc7\u5916\u90e8\u7c7b\u76f4\u63a5\u8bbf\u95ee\uff0c\u5bf9\u8c61\u7ea7\u9700\u8981\u5148\u751f\u6210\u5916\u90e8\u7684\u5bf9\u8c61\u540e\u624d\u80fd\u8bbf\u95ee\u3002<\/p>\n
\u975e\u9759\u6001\u5185\u90e8\u7c7b\u4e2d\u4e0d\u80fd\u58f0\u660e\u4efb\u4f55 static \u6210\u5458\u3002<\/p>\n
\u5185\u90e8\u7c7b\u53ef\u4ee5\u76f8\u4e92\u8c03\u7528\uff0c\u4f8b\u5982\uff1a
\nclass A {
\n\u00a0\u00a0\u00a0 \/\/ B\u3001C \u95f4\u53ef\u4ee5\u4e92\u76f8\u8c03\u7528
\n\u00a0\u00a0\u00a0 class B {}
\n\u00a0\u00a0\u00a0 class C {}
\n}
\n\u6210\u5458\u5f0f\u5185\u90e8\u7c7b\u7684\u8bbf\u95ee<\/p>\n
\u5185\u90e8\u7c7b\u7684\u5bf9\u8c61\u4ee5\u6210\u5458\u53d8\u91cf\u7684\u65b9\u5f0f\u8bb0\u5f55\u5176\u6240\u4f9d\u8d56\u7684\u5916\u5c42\u7c7b\u5bf9\u8c61\u7684\u5f15\u7528\uff0c\u56e0\u800c\u53ef\u4ee5\u627e\u5230\u8be5\u5916\u5c42\u7c7b\u5bf9\u8c61\u5e76\u8bbf\u95ee\u5176\u6210\u5458\u3002\u8be5\u6210\u5458\u53d8\u91cf\u662f\u7cfb\u7edf\u81ea\u52a8\u4e3a\u975e static \u7684\u5185\u90e8\u7c7b\u6dfb\u52a0\u7684\uff0c\u540d\u79f0\u7ea6\u5b9a\u4e3a\u201coutClassName.this\u201d\u3002<\/p>\n
1) \u4f7f\u7528\u5185\u90e8\u7c7b\u4e2d\u5b9a\u4e49\u7684\u975e\u9759\u6001\u53d8\u91cf\u548c\u65b9\u6cd5\u65f6\uff0c\u8981\u5148\u521b\u5efa\u5916\u90e8\u7c7b\u7684\u5bf9\u8c61\uff0c\u518d\u7531\u201coutObjectName.new\u201d\u64cd\u4f5c\u7b26\u521b\u5efa\u5185\u90e8\u7c7b\u7684\u5bf9\u8c61\uff0c\u518d\u8c03\u7528\u5185\u90e8\u7c7b\u7684\u65b9\u6cd5\uff0c\u5982\u4e0b\u6240\u793a\uff1a
\n[java]public class Demo{
\n\u00a0\u00a0\u00a0 public static void main(String[] args) {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Outer outer = new Outer();
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Outer.Inner inner = outer.new Inner();
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 inner.dostuff();
\n\u00a0\u00a0\u00a0 }
\n}
\nclass Outer{
\n\u00a0\u00a0\u00a0 private int size;
\n\u00a0\u00a0\u00a0 class Inner{
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 public void dostuff() {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 size++;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0 }
\n}
\n[\/java]
\n2) static \u5185\u90e8\u7c7b\u76f8\u5f53\u4e8e\u5176\u5916\u90e8\u7c7b\u7684 static \u6210\u5458\uff0c\u5b83\u7684\u5bf9\u8c61\u4e0e\u5916\u90e8\u7c7b\u5bf9\u8c61\u95f4\u4e0d\u5b58\u5728\u4f9d\u8d56\u5173\u7cfb\uff0c\u56e0\u6b64\u53ef\u76f4\u63a5\u521b\u5efa\u3002\u793a\u4f8b\u5982\u4e0b\uff1a
\n[java]public class Demo{
\n\u00a0\u00a0\u00a0 public static void main(String[] args) {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Outer.Inner inner = new Outer.Inner();
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 inner.dostuff();
\n\u00a0\u00a0\u00a0 }
\n}
\nclass Outer{
\n\u00a0\u00a0\u00a0 private static int size;
\n\u00a0\u00a0\u00a0 static class Inner {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 public void dostuff() {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 size++;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println("size=" + size);
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0 }
\n}
\n\u8fd0\u884c\u7ed3\u679c\uff1a
\nsize=1[\/java]<\/p>\n
3) \u7531\u4e8e\u5185\u90e8\u7c7b\u53ef\u4ee5\u76f4\u63a5\u8bbf\u95ee\u5176\u5916\u90e8\u7c7b\u7684\u6210\u5206\uff0c\u56e0\u6b64\u5f53\u5185\u90e8\u7c7b\u4e0e\u5176\u5916\u90e8\u7c7b\u4e2d\u5b58\u5728\u540c\u540d\u5c5e\u6027\u6216\u65b9\u6cd5\u65f6\uff0c\u4e5f\u5c06\u5bfc\u81f4\u547d\u540d\u51b2\u7a81\u3002\u6240\u4ee5\u5728\u591a\u5c42\u8c03\u7528\u65f6\u8981\u6307\u660e\uff0c\u5982\u4e0b\u6240\u793a\uff1a
\n[java]public class Outer{
\n\u00a0\u00a0\u00a0 private int size;
\n\u00a0\u00a0\u00a0 public class Inner{
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 private int size;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 public void dostuff(int size){
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 size++; \/\/ \u5c40\u90e8\u53d8\u91cf size;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 this.size; \/\/ \u5185\u90e8\u7c7b\u7684 size
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Outer.this.size++; \/\/ \u5916\u90e8\u7c7b\u7684 size
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0 }
\n}[\/java]
\n2.\u5c40\u90e8\u5185\u90e8\u7c7b<\/p>\n
\u5c40\u90e8\u5185\u90e8\u7c7b(Local class)\u662f\u5b9a\u4e49\u5728\u4ee3\u7801\u5757\u4e2d\u7684\u7c7b\u3002\u5b83\u4eec\u53ea\u5728\u5b9a\u4e49\u5b83\u4eec\u7684\u4ee3\u7801\u5757\u4e2d\u662f\u53ef\u89c1\u7684\u3002<\/p>\n
\u5c40\u90e8\u7c7b\u6709\u51e0\u4e2a\u91cd\u8981\u7279\u6027\uff1a
\n\u4ec5\u5728\u5b9a\u4e49\u4e86\u5b83\u4eec\u7684\u4ee3\u7801\u5757\u4e2d\u662f\u53ef\u89c1\u7684\uff1b
\n\u53ef\u4ee5\u4f7f\u7528\u5b9a\u4e49\u5b83\u4eec\u7684\u4ee3\u7801\u5757\u4e2d\u7684\u4efb\u4f55\u5c40\u90e8 final \u53d8\u91cf\uff1b
\n\u5c40\u90e8\u7c7b\u4e0d\u53ef\u4ee5\u662f static \u7684\uff0c\u91cc\u8fb9\u4e5f\u4e0d\u80fd\u5b9a\u4e49 static \u6210\u5458\uff1b
\n\u5c40\u90e8\u7c7b\u4e0d\u53ef\u4ee5\u7528 public\u3001private\u3001protected \u4fee\u9970\uff0c\u53ea\u80fd\u4f7f\u7528\u7f3a\u7701\u7684\uff1b
\n\u5c40\u90e8\u7c7b\u53ef\u4ee5\u662f abstract \u7684\u3002<\/p>\n
\u8bf7\u770b\u4e0b\u9762\u7684\u4ee3\u7801\uff1a
\n[java]public class Outer {
\n\u00a0\u00a0\u00a0 public static final int TOTAL_NUMBER = 5;
\n\u00a0\u00a0\u00a0 public int id = 123;
\n\u00a0\u00a0\u00a0 public void func() {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 final int age = 15;
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 String str = "http:\/\/www.warmtel.com";
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 class Inner {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 public void innerTest() {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println(TOTAL_NUMBER);
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println(id);
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ System.out.println(str);\u4e0d\u5408\u6cd5\uff0c\u53ea\u80fd\u8bbf\u95ee\u672c\u5730\u65b9\u6cd5\u7684final\u53d8\u91cf
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println(age);
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 new Inner().innerTest();
\n\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0 public static void main(String[] args) {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Outer outer = new Outer();
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 outer.func();
\n\u00a0\u00a0\u00a0 }
\n}
\n\u8fd0\u884c\u7ed3\u679c\uff1a
\n5
\n123
\n15[\/java]
\n3.\u533f\u540d\u5185\u90e8\u7c7b<\/p>\n
\u533f\u540d\u5185\u90e8\u7c7b\u662f\u5c40\u90e8\u5185\u90e8\u7c7b\u7684\u4e00\u79cd\u7279\u6b8a\u5f62\u5f0f\uff0c\u4e5f\u5c31\u662f\u6ca1\u6709\u53d8\u91cf\u540d\u6307\u5411\u8fd9\u4e2a\u7c7b\u7684\u5b9e\u4f8b\uff0c\u800c\u4e14\u5177\u4f53\u7684\u7c7b\u5b9e\u73b0\u4f1a\u5199\u5728\u8fd9\u4e2a\u5185\u90e8\u7c7b\u91cc\u9762\u3002<\/p>\n
\u6ce8\u610f\uff1a\u533f\u540d\u7c7b\u5fc5\u987b\u7ee7\u627f\u4e00\u4e2a\u7236\u7c7b\u6216\u5b9e\u73b0\u4e00\u4e2a\u63a5\u53e3\u3002<\/p>\n
\u4e0d\u4f7f\u7528\u533f\u540d\u5185\u90e8\u7c7b\u6765\u5b9e\u73b0\u62bd\u8c61\u65b9\u6cd5\uff1a
\n[java]abstract class Person {
\n\u00a0\u00a0\u00a0 public abstract void eat();
\n}
\nclass Child extends Person {
\n\u00a0\u00a0\u00a0 public void eat() {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println("eat something");
\n\u00a0\u00a0\u00a0 }
\n}
\npublic class Demo {
\n\u00a0\u00a0\u00a0 public static void main(String[] args) {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Person p = new Child();
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 p.eat();
\n\u00a0\u00a0\u00a0 }
\n}
\n\u8fd0\u884c\u7ed3\u679c\uff1a
\neat something[\/java]<\/p>\n
\u53ef\u4ee5\u770b\u5230\uff0c\u6211\u4eec\u7528Child\u7ee7\u627f\u4e86Person\u7c7b\uff0c\u7136\u540e\u5b9e\u73b0\u4e86Child\u7684\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u5c06\u5176\u5411\u4e0a\u8f6c\u578b\u4e3aPerson\u7c7b\u7684\u5f15\u7528\u3002\u4f46\u662f\uff0c\u5982\u679c\u6b64\u5904\u7684Child\u7c7b\u53ea\u4f7f\u7528\u4e00\u6b21\uff0c\u90a3\u4e48\u5c06\u5176\u7f16\u5199\u4e3a\u72ec\u7acb\u7684\u4e00\u4e2a\u7c7b\u5c82\u4e0d\u662f\u5f88\u9ebb\u70e6\uff1f<\/p>\n
\u8fd9\u4e2a\u65f6\u5019\u5c31\u5f15\u5165\u4e86\u533f\u540d\u5185\u90e8\u7c7b\u3002\u4f7f\u7528\u533f\u540d\u5185\u90e8\u7c7b\u5b9e\u73b0\uff1a
\n[java]abstract class Person {
\n\u00a0\u00a0\u00a0 public abstract void eat();
\n}
\npublic class Demo {
\n\u00a0\u00a0\u00a0 public static void main(String[] args){
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ \u7ee7\u627f Person \u7c7b
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 new Person() {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 public void eat() {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println("eat something");
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }.eat();
\n\u00a0\u00a0\u00a0 }
\n}[\/java]
\n\u53ef\u4ee5\u770b\u5230\uff0c\u533f\u540d\u7c7b\u7ee7\u627f\u4e86 Person \u7c7b\u5e76\u5728\u5927\u62ec\u53f7\u4e2d\u5b9e\u73b0\u4e86\u62bd\u8c61\u7c7b\u7684\u65b9\u6cd5\u3002<\/p>\n
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