\u6211\u4eec\u77e5\u9053\uff0c\u4f7f\u7528\u53d8\u91cf\u4e4b\u524d\u8981\u5b9a\u4e49\uff0c\u5b9a\u4e49\u4e00\u4e2a\u53d8\u91cf\u65f6\u5fc5\u987b\u8981\u6307\u660e\u5b83\u7684\u6570\u636e\u7c7b\u578b\uff0c\u4ec0\u4e48\u6837\u7684\u6570\u636e\u7c7b\u578b\u8d4b\u7ed9\u4ec0\u4e48\u6837\u7684\u503c\u3002
\n\u5047\u5982\u6211\u4eec\u73b0\u5728\u8981\u5b9a\u4e49\u4e00\u4e2a\u7c7b\u6765\u8868\u793a\u5750\u6807\uff0c\u8981\u6c42\u5750\u6807\u7684\u6570\u636e\u7c7b\u578b\u53ef\u4ee5\u662f\u6574\u6570\u3001\u5c0f\u6570\u548c\u5b57\u7b26\u4e32\uff0c\u4f8b\u5982\uff1a<\/p>\n
[java]x = 10\u3001y = 10
\nx = 12.88\u3001y = 129.65
\nx = "\u4e1c\u7ecf180\u5ea6"\u3001y = "\u5317\u7eac210\u5ea6"[\/java]<\/p>\n
\u9488\u5bf9\u4e0d\u540c\u7684\u6570\u636e\u7c7b\u578b\uff0c\u9664\u4e86\u501f\u52a9\u65b9\u6cd5\u91cd\u8f7d\uff0c\u8fd8\u53ef\u4ee5\u501f\u52a9\u81ea\u52a8\u88c5\u7bb1\u548c\u5411\u4e0a\u8f6c\u578b\u3002\u6211\u4eec\u77e5\u9053\uff0c\u57fa\u672c\u6570\u636e\u7c7b\u578b\u53ef\u4ee5\u81ea\u52a8\u88c5\u7bb1\uff0c\u88ab\u8f6c\u6362\u6210\u5bf9\u5e94\u7684\u5305\u88c5\u7c7b\uff1bObject \u662f\u6240\u6709\u7c7b\u7684\u7956\u5148\u7c7b\uff0c\u4efb\u4f55\u4e00\u4e2a\u7c7b\u7684\u5b9e\u4f8b\u90fd\u53ef\u4ee5\u5411\u4e0a\u8f6c\u578b\u4e3a Object \u7c7b\u578b\uff0c\u4f8b\u5982\uff1a<\/p>\n
[java]int –> Integer –>Object
\n int a = 10;
\n Integer a1 = a; \/\/\u81ea\u52a8\u88c5\u7bb1 class Teacher extends Person{}
\n Object a2 = a1; \/\/\u5411\u4e0a\u8f6c\u578b Teacher t = new Teacher();
\n Person p = t; \/\/\u5411\u4e0a\u8f6c\u578b
\ndouble –>Double –>Object
\nString –>Object[\/java]<\/p>\n
\u8fd9\u6837\uff0c\u53ea\u9700\u8981\u5b9a\u4e49\u4e00\u4e2a\u65b9\u6cd5\uff0c\u5c31\u53ef\u4ee5\u63a5\u6536\u6240\u6709\u7c7b\u578b\u7684\u6570\u636e\u3002\u8bf7\u770b\u4e0b\u9762\u7684\u4ee3\u7801\uff1a<\/p>\n
[java]class Point{
\n Object x = 0;
\n Object y = 0;
\n public Object getX() {
\n return x;
\n }
\n public void setX(Object x) {
\n this.x = x;
\n }
\n public Object getY() {
\n return y;
\n }
\n public void setY(Object y) {
\n this.y = y;
\n }
\n}<\/p>\n
public class Demo {
\n public static void main(String[] args){
\n Point p = new Point();
\n p.setX(10); \/\/ int -> Integer ->Object
\n p.setY(20);
\n int x = (Integer)p.getX(); \/\/ \u5fc5\u987b\u5411\u4e0b\u8f6c\u578b
\n int y = (Integer)p.getY();
\n System.out.println("This point is\uff1a" + x + ", " + y);<\/p>\n
p.setX(25.4); \/\/ double -> Integer ->Object
\n p.setY("\u4e1c\u4eac180\u5ea6");
\n double m = (Double)p.getX(); \/\/ \u5fc5\u987b\u5411\u4e0b\u8f6c\u578b
\n double n = (Double)p.getY(); \/\/ \u8fd0\u884c\u671f\u95f4\u629b\u51fa\u5f02\u5e38
\n System.out.println("This point is\uff1a" + m + ", " + n);
\n }
\n}[\/java]<\/p>\n
\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u751f\u6210\u5750\u6807\u65f6\u4e0d\u4f1a\u6709\u4efb\u4f55\u95ee\u9898\uff0c\u4f46\u662f\u53d6\u51fa\u5750\u6807\u65f6\uff0c\u8981\u5411\u4e0b\u8f6c\u578b\uff0c\u5728Java\u591a\u6001\u5bf9\u8c61\u7684\u7c7b\u578b\u8f6c\u6362\u4e00\u6587\u4e2d\u6211\u4eec\u8bb2\u5230\uff0c\u5411\u4e0b\u8f6c\u578b\u5b58\u5728\u7740\u98ce\u9669\uff0c\u800c\u4e14\u7f16\u8bd1\u671f\u95f4\u4e0d\u5bb9\u6613\u53d1\u73b0\uff0c\u53ea\u6709\u5728\u8fd0\u884c\u671f\u95f4\u624d\u4f1a\u629b\u51fa\u5f02\u5e38\uff0c\u6240\u4ee5\u8981\u5c3d\u91cf\u907f\u514d\u4f7f\u7528\u5411\u4e0b\u8f6c\u578b\u3002\u8fd0\u884c\u4e0a\u9762\u7684\u4ee3\u7801\uff0c\u7b2c12\u884c\u4f1a\u629b\u51fa java.lang.ClassCastException \u5f02\u5e38\u3002<\/p>\n
\u90a3\u4e48\uff0c\u6709\u6ca1\u6709\u66f4\u597d\u7684\u529e\u6cd5\uff0c\u65e2\u53ef\u4ee5\u4e0d\u4f7f\u7528\u91cd\u8f7d\uff08\u6709\u91cd\u590d\u4ee3\u7801\uff09\uff0c\u53c8\u80fd\u628a\u98ce\u9669\u964d\u5230\u6700\u4f4e\u5462\uff1f
\n\u6709\uff0c\u53ef\u4ee5\u4f7f\u7528\u6cdb\u578b\u7c7b(Java Class)\uff0c\u5b83\u53ef\u4ee5\u63a5\u53d7\u4efb\u610f\u7c7b\u578b\u7684\u6570\u636e\u3002\u6240\u8c13\u201c\u6cdb\u578b\u201d\uff0c\u5c31\u662f\u201c\u5bbd\u6cdb\u7684\u6570\u636e\u7c7b\u578b\u201d\uff0c\u4efb\u610f\u7684\u6570\u636e\u7c7b\u578b\u3002<\/p>\n
[java]\/\/ \u5b9a\u4e49\u6cdb\u578b\u7c7b
\nclass Point<T1, T2>{
\n T1 x;
\n T2 y;
\n public T1 getX() {
\n return x;
\n }
\n public void setX(T1 x) {
\n this.x = x;
\n }
\n public T2 getY() {
\n return y;
\n }
\n public void setY(T2 y) {
\n this.y = y;
\n }
\n}<\/p>\n
public class Demo {
\n public static void main(String[] args){
\n \/\/ \u5b9e\u4f8b\u5316\u6cdb\u578b\u7c7b
\n Point<Integer, Integer> p1 = new Point<Integer, Integer>();
\n p1.setX(10);
\n p1.setY(20);
\n int x = p1.getX();
\n int y = p1.getY();
\n System.out.println("This point is\uff1a" + x + ", " + y);<\/p>\n
Point<Double, String> p2 = new Point<Double, String>();
\n p2.setX(25.4);
\n p2.setY("\u4e1c\u4eac180\u5ea6");
\n double m = p2.getX();
\n String n = p2.getY();
\n System.out.println("This point is\uff1a" + m + ", " + n);
\n }
\n}
\n\u8fd0\u884c\u7ed3\u679c\uff1a
\nThis point is\uff1a10, 20
\nThis point is\uff1a25.4, \u4e1c\u4eac180\u5ea6[\/java]<\/p>\n
\u4e0e\u666e\u901a\u7c7b\u7684\u5b9a\u4e49\u76f8\u6bd4\uff0c\u4e0a\u9762\u7684\u4ee3\u7801\u5728\u7c7b\u540d\u540e\u9762\u591a\u51fa\u4e86<T1, T2>\uff0cT1, T2 \u662f\u81ea\u5b9a\u4e49\u7684\u6807\u8bc6\u7b26\uff0c\u4e5f\u662f\u53c2\u6570\uff0c\u7528\u6765\u4f20\u9012\u6570\u636e\u7684\u7c7b\u578b\uff0c\u800c\u4e0d\u662f\u6570\u636e\u7684\u503c\uff0c\u6211\u4eec\u79f0\u4e4b\u4e3a\u7c7b\u578b\u53c2\u6570\u3002\u5728\u6cdb\u578b\u4e2d\uff0c\u4e0d\u4f46\u6570\u636e\u7684\u503c\u53ef\u4ee5\u901a\u8fc7\u53c2\u6570\u4f20\u9012\uff0c\u6570\u636e\u7684\u7c7b\u578b\u4e5f\u53ef\u4ee5\u901a\u8fc7\u53c2\u6570\u4f20\u9012\u3002T1, T2 \u53ea\u662f\u6570\u636e\u7c7b\u578b\u7684\u5360\u4f4d\u7b26\uff0c\u8fd0\u884c\u65f6\u4f1a\u88ab\u66ff\u6362\u4e3a\u771f\u6b63\u7684\u6570\u636e\u7c7b\u578b\u3002
\n\u4f20\u503c\u53c2\u6570\uff08\u6211\u4eec\u901a\u5e38\u6240\u8bf4\u7684\u53c2\u6570\uff09\u7531\u5c0f\u62ec\u53f7\u5305\u56f4\uff0c\u5982(int x, double y)\uff0c\u7c7b\u578b\u53c2\u6570\uff08\u6cdb\u578b\u53c2\u6570\uff09\u7531\u5c16\u62ec\u53f7\u5305\u56f4\uff0c\u591a\u4e2a\u53c2\u6570\u7531\u9017\u53f7\u5206\u9694\uff0c\u5982 \u6216 <T, E>\u3002
\n\u7c7b\u578b\u53c2\u6570\u9700\u8981\u5728\u7c7b\u540d\u540e\u9762\u7ed9\u51fa\u3002\u4e00\u65e6\u7ed9\u51fa\u4e86\u7c7b\u578b\u53c2\u6570\uff0c\u5c31\u53ef\u4ee5\u5728\u7c7b\u4e2d\u4f7f\u7528\u4e86\u3002
\n\u7c7b\u578b\u53c2\u6570\u5fc5\u987b\u662f\u4e00\u4e2a\u5408\u6cd5\u7684\u6807\u8bc6\u7b26\uff0c\u4e60\u60ef\u4e0a\u4f7f\u7528\u5355\u4e2a\u5927\u5199\u5b57\u6bcd\uff0c\u901a\u5e38\u60c5\u51b5\u4e0b\uff0cK \u8868\u793a\u952e\uff0cV \u8868\u793a\u503c\uff0cE \u8868\u793a\u5f02\u5e38\u6216\u9519\u8bef\uff0cT \u8868\u793a\u4e00\u822c\u610f\u4e49\u4e0a\u7684\u6570\u636e\u7c7b\u578b\u3002<\/p>\n
\u6cdb\u578b\u7c7b\u5728\u5b9e\u4f8b\u5316\u65f6\u5fc5\u987b\u6307\u51fa\u5177\u4f53\u7684\u7c7b\u578b\uff0c\u4e5f\u5c31\u662f\u5411\u7c7b\u578b\u53c2\u6570\u4f20\u503c\uff0c\u683c\u5f0f\u4e3a\uff1a<\/p>\n
[java] className variable<dataType1, dataType2> = new className<dataType1, dataType2>();[\/java]<\/p>\n
\u4e5f\u53ef\u4ee5\u7701\u7565\u7b49\u53f7\u53f3\u8fb9\u7684\u6570\u636e\u7c7b\u578b\uff0c\u4f46\u662f\u4f1a\u4ea7\u751f\u8b66\u544a\uff0c\u5373\uff1a<\/p>\n
[java] className variable<dataType1, dataType2> = new className();[\/java]<\/p>\n
\u56e0\u4e3a\u5728\u4f7f\u7528\u6cdb\u578b\u7c7b\u65f6\u6307\u660e\u4e86\u6570\u636e\u7c7b\u578b\uff0c\u8d4b\u7ed9\u5176\u4ed6\u7c7b\u578b\u7684\u503c\u4f1a\u629b\u51fa\u5f02\u5e38\uff0c\u65e2\u4e0d\u9700\u8981\u5411\u4e0b\u8f6c\u578b\uff0c\u4e5f\u6ca1\u6709\u6f5c\u5728\u7684\u98ce\u9669\uff0c\u6bd4\u672c\u6587\u4e00\u5f00\u59cb\u4ecb\u7ecd\u7684\u81ea\u52a8\u88c5\u7bb1\u548c\u5411\u4e0a\u8f6c\u578b\u8981\u66f4\u52a0\u5b9e\u7528\u3002
\n\u6ce8\u610f\uff1a
\n\u6cdb\u578b\u662f Java 1.5 \u7684\u65b0\u589e\u7279\u6027\uff0c\u5b83\u4ee5C++\u6a21\u677f\u4e3a\u53c2\u7167\uff0c\u672c\u8d28\u662f\u53c2\u6570\u5316\u7c7b\u578b(Parameterized Type)\u7684\u5e94\u7528\u3002
\n\u7c7b\u578b\u53c2\u6570\u53ea\u80fd\u7528\u6765\u8868\u793a\u5f15\u7528\u7c7b\u578b\uff0c\u4e0d\u80fd\u7528\u6765\u8868\u793a\u57fa\u672c\u7c7b\u578b\uff0c\u5982 int\u3001double\u3001char \u7b49\u3002\u4f46\u662f\u4f20\u9012\u57fa\u672c\u7c7b\u578b\u4e0d\u4f1a\u62a5\u9519\uff0c\u56e0\u4e3a\u5b83\u4eec\u4f1a\u81ea\u52a8\u88c5\u7bb1\u6210\u5bf9\u5e94\u7684\u5305\u88c5\u7c7b\u3002<\/p>\n
\u9664\u4e86\u5b9a\u4e49\u6cdb\u578b\u7c7b\uff0c\u8fd8\u53ef\u4ee5\u5b9a\u4e49\u6cdb\u578b\u65b9\u6cd5\uff0c\u4f8b\u5982\uff0c\u5b9a\u4e49\u4e00\u4e2a\u6253\u5370\u5750\u6807\u7684\u6cdb\u578b\u65b9\u6cd5\uff1a<\/p>\n
[java]\/\/ \u5b9a\u4e49\u6cdb\u578b\u7c7b
\nclass Point<T1, T2>{
\n T1 x;
\n T2 y;
\n public T1 getX() {
\n return x;
\n }
\n public void setX(T1 x) {
\n this.x = x;
\n }
\n public T2 getY() {
\n return y;
\n }
\n public void setY(T2 y) {
\n this.y = y;
\n }<\/p>\n
\/\/ \u5b9a\u4e49\u6cdb\u578b\u65b9\u6cd5
\n public <T1, T2> void printPoint(T1 x, T2 y){
\n T1 m = x;
\n T2 n = y;
\n System.out.println("This point is\uff1a" + m + ", " + n);
\n }
\n}<\/p>\n
public class Demo {
\n public static void main(String[] args){
\n \/\/ \u5b9e\u4f8b\u5316\u6cdb\u578b\u7c7b
\n Point<Integer, Integer> p1 = new Point<Integer, Integer>();
\n p1.setX(10);
\n p1.setY(20);
\n p1.printPoint(p1.getX(), p1.getY());<\/p>\n
Point<Double, String> p2 = new Point<Double, String>();
\n p2.setX(25.4);
\n p2.setY("\u4e1c\u4eac180\u5ea6");
\n p2.printPoint(p2.getX(), p2.getY());
\n }
\n}
\n\u8fd0\u884c\u7ed3\u679c\uff1a
\nThis point is\uff1a10, 20
\nThis point is\uff1a25.4, \u4e1c\u4eac180\u5ea6[\/java]<\/p>\n
\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\u5b9a\u4e49\u4e86\u4e00\u4e2a\u6cdb\u578b\u65b9\u6cd5printPoint()\uff0c\u65e2\u6709\u666e\u901a\u53c2\u6570\uff0c\u4e5f\u6709\u7c7b\u578b\u53c2\u6570\uff0c\u7c7b\u578b\u53c2\u6570\u9700\u8981\u653e\u5728\u4fee\u9970\u7b26\u540e\u9762\u3001\u8fd4\u56de\u503c\u7c7b\u578b\u524d\u9762\u3002\u4e00\u65e6\u5b9a\u4e49\u4e86\u7c7b\u578b\u53c2\u6570\uff0c\u5c31\u53ef\u4ee5\u5728\u53c2\u6570\u5217\u8868\u3001\u65b9\u6cd5\u4f53\u548c\u8fd4\u56de\u503c\u7c7b\u578b\u4e2d\u4f7f\u7528\u4e86\u3002
\n\u4e0e\u4f7f\u7528\u6cdb\u578b\u7c7b\u4e0d\u540c\uff0c\u4f7f\u7528\u6cdb\u578b\u65b9\u6cd5\u65f6\u4e0d\u5fc5\u6307\u660e\u53c2\u6570\u7c7b\u578b\uff0c\u7f16\u8bd1\u5668\u4f1a\u6839\u636e\u4f20\u9012\u7684\u53c2\u6570\u81ea\u52a8\u67e5\u627e\u51fa\u5177\u4f53\u7684\u7c7b\u578b\u3002\u6cdb\u578b\u65b9\u6cd5\u9664\u4e86\u5b9a\u4e49\u4e0d\u540c\uff0c\u8c03\u7528\u5c31\u50cf\u666e\u901a\u65b9\u6cd5\u4e00\u6837\u3002<\/p>\n
\u6ce8\u610f\uff1a\u6cdb\u578b\u65b9\u6cd5\u4e0e\u6cdb\u578b\u7c7b\u6ca1\u6709\u5fc5\u7136\u7684\u8054\u7cfb\uff0c\u6cdb\u578b\u65b9\u6cd5\u6709\u81ea\u5df1\u7684\u7c7b\u578b\u53c2\u6570\uff0c\u5728\u666e\u901a\u7c7b\u4e2d\u4e5f\u53ef\u4ee5\u5b9a\u4e49\u6cdb\u578b\u65b9\u6cd5\u3002\u6cdb\u578b\u65b9\u6cd5printPoint() \u4e2d\u7684\u7c7b\u578b\u53c2\u6570 T1, T2 \u4e0e\u6cdb\u578b\u7c7b Point \u4e2d\u7684 T1, T2 \u6ca1\u6709\u5fc5\u7136\u7684\u8054\u7cfb\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528\u5176\u4ed6\u7684\u6807\u8bc6\u7b26\u4ee3\u66ff\uff1a<\/p>\n
[java]public static <V1, V2> void printPoint(V1 x, V2 y){
\n V1 m = x;
\n V2 n = y;
\n System.out.println("This point is\uff1a" + m + ", " + n);
\n}[\/java]<\/p>\n
\u5728Java\u4e2d\u4e5f\u53ef\u4ee5\u5b9a\u4e49\u6cdb\u578b\u63a5\u53e3\uff0c\u8fd9\u91cc\u4e0d\u518d\u8d58\u8ff0\uff0c\u4ec5\u4ec5\u7ed9\u51fa\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
[java]\/\/\u5b9a\u4e49\u6cdb\u578b\u63a5\u53e3
\ninterface Info<T>{
\n public T getVar();
\n}
\n\/\/\u5b9e\u73b0\u63a5\u53e3
\nclass InfoImp<T> implements Info<T> {
\n private T var;
\n \/\/ \u5b9a\u4e49\u6cdb\u578b\u6784\u9020\u65b9\u6cd5
\n public InfoImp(T var) {
\n this.setVar(var);
\n }
\n public void setVar(T var) {
\n this.var = var;
\n }
\n public T getVar() {
\n return this.var;
\n }
\n}
\npublic class Demo {
\n public static void main(String arsg[]) {
\n Info<String> obj = new InfoImp<String>("www.weixueyuan.net");
\n System.out.println("Length Of String: " + obj.getVar().length());
\n }
\n}<\/p>\n
\u8fd0\u884c\u7ed3\u679c\uff1a
\nLength Of String: 18[\/java]<\/p>\n
\u5982\u679c\u5728\u4f7f\u7528\u6cdb\u578b\u65f6\u6ca1\u6709\u6307\u660e\u6570\u636e\u7c7b\u578b\uff0c\u90a3\u4e48\u5c31\u4f1a\u64e6\u9664\u6cdb\u578b\u7c7b\u578b\uff0c\u8bf7\u770b\u4e0b\u9762\u7684\u4ee3\u7801\uff1a<\/p>\n
[java]class Point<T1, T2>{
\n T1 x;
\n T2 y;
\n public T1 getX() {
\n return x;
\n }
\n public void setX(T1 x) {
\n this.x = x;
\n }
\n public T2 getY() {
\n return y;
\n }
\n public void setY(T2 y) {
\n this.y = y;
\n }
\n}
\npublic class Demo {
\n public static void main(String[] args){
\n Point p = new Point(); \/\/ \u7c7b\u578b\u64e6\u9664
\n p.setX(10);
\n p.setY(20.8);
\n int x = (Integer)p.getX(); \/\/ \u5411\u4e0b\u8f6c\u578b
\n double y = (Double)p.getY();
\n System.out.println("This point is\uff1a" + x + ", " + y);
\n }
\n}<\/p>\n
\u8fd0\u884c\u7ed3\u679c\uff1a
\nThis point is\uff1a10, 20.8[\/java]<\/p>\n
\u56e0\u4e3a\u5728\u4f7f\u7528\u6cdb\u578b\u65f6\u6ca1\u6709\u6307\u660e\u6570\u636e\u7c7b\u578b\uff0c\u4e3a\u4e86\u4e0d\u51fa\u73b0\u9519\u8bef\uff0c\u7f16\u8bd1\u5668\u4f1a\u5c06\u6240\u6709\u6570\u636e\u5411\u4e0a\u8f6c\u578b\u4e3aObject\uff0c\u6240\u4ee5\u5728\u53d6\u51fa\u5750\u6807\u4f7f\u7528\u65f6\u8981\u5411\u4e0b\u8f6c\u578b\uff0c\u8fd9\u4e0e\u672c\u6587\u4e00\u5f00\u59cb\u4e0d\u4f7f\u7528\u6cdb\u578b\u6ca1\u4ec0\u4e48\u4e24\u6837\u3002<\/p>\n
\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u7c7b\u578b\u53c2\u6570\u53ef\u4ee5\u63a5\u53d7\u4efb\u610f\u7684\u6570\u636e\u7c7b\u578b\uff0c\u53ea\u8981\u5b83\u662f\u88ab\u5b9a\u4e49\u8fc7\u7684\u3002\u4f46\u662f\uff0c\u5f88\u591a\u65f6\u5019\u6211\u4eec\u53ea\u9700\u8981\u4e00\u90e8\u5206\u6570\u636e\u7c7b\u578b\u5c31\u591f\u4e86\uff0c\u7528\u6237\u4f20\u9012\u5176\u4ed6\u6570\u636e\u7c7b\u578b\u53ef\u80fd\u4f1a\u5f15\u8d77\u9519\u8bef\u3002\u4f8b\u5982\uff0c\u7f16\u5199\u4e00\u4e2a\u6cdb\u578b\u51fd\u6570\u7528\u4e8e\u8fd4\u56de\u4e0d\u540c\u7c7b\u578b\u6570\u7ec4\uff08Integer \u6570\u7ec4\u3001Double \u6570\u7ec4\u3001Character \u6570\u7ec4\u7b49\uff09\u4e2d\u7684\u6700\u5927\u503c\uff1a<\/p>\n
[java]public <T> T getMax(T array[]){
\n T max = null;
\n for(T element : array){
\n max = element.doubleValue() > max.doubleValue() ? element : max;
\n }
\n return max;
\n}[\/java]<\/p>\n
\u4e0a\u9762\u7684\u4ee3\u7801\u4f1a\u62a5\u9519\uff0cdoubleValue() \u662f Number \u7c7b\u7684\u65b9\u6cd5\uff0c\u4e0d\u662f\u6240\u6709\u7684\u7c7b\u90fd\u6709\u8be5\u65b9\u6cd5\uff0c\u6240\u4ee5\u6211\u4eec\u8981\u9650\u5236\u7c7b\u578b\u53c2\u6570T\uff0c\u8ba9\u5b83\u53ea\u80fd\u63a5\u53d7 Number \u53ca\u5176\u5b50\u7c7b\uff08Integer\u3001Double\u3001 \u7b49\uff09\u3002
\n\u901a\u8fc7 extends \u5173\u952e\u5b57\u53ef\u4ee5\u9650\u5236\u6cdb\u578b\u7684\u7c7b\u578b\uff0c\u6539\u8fdb\u4e0a\u9762\u7684\u4ee3\u7801\uff1a<\/p>\n
[java]public <T extends Number> T getMax(T array[]){
\n T max = null;
\n for(T element : array){
\n max = element.doubleValue() > max.doubleValue() ? element : max;
\n }
\n return max;
\n}[\/java]<\/p>\n
\u8868\u793a T \u53ea\u63a5\u53d7Number \u53ca\u5176\u5b50\u7c7b\uff0c\u4f20\u5165\u5176\u4ed6\u7c7b\u578b\u7684\u6570\u636e\u4f1a\u62a5\u9519\u3002\u8fd9\u91cc\u7684\u9650\u5b9a\u4f7f\u7528\u5173\u952e\u5b57extends\uff0c\u540e\u9762\u53ef\u4ee5\u662f\u7c7b\u4e5f\u53ef\u4ee5\u662f\u63a5\u53e3\u3002\u4f46\u8fd9\u91cc\u7684 extends \u5df2\u7ecf\u4e0d\u662f\u7ee7\u627f\u7684\u542b\u4e49\u4e86\uff0c\u5e94\u8be5\u7406\u89e3\u4e3a T \u662f\u7ee7\u627f\u81ea Number \u7c7b\u7684\u7c7b\u578b\uff0c\u6216\u8005 T \u662f\u5b9e\u73b0\u4e86 XX \u63a5\u53e3\u7684\u7c7b\u578b\u3002
\n\u6ce8\u610f\uff1a\u4e00\u822c\u7684\u5e94\u7528\u5f00\u53d1\u4e2d\u6cdb\u578b\u4f7f\u7528\u8f83\u5c11\uff0c\u591a\u7528\u5728\u6846\u67b6\u6216\u8005\u5e93\u7684\u8bbe\u8ba1\u4e2d\uff0c\u8fd9\u91cc\u4e0d\u518d\u6df1\u5165\u8bb2\u89e3\uff0c\u4e3b\u8981\u8ba9\u5927\u5bb6\u5bf9\u6cdb\u578b\u6709\u6240\u8ba4\u8bc6\uff0c\u4e3a\u540e\u9762\u7684\u6559\u7a0b\u505a\u94fa\u57ab\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e00\u3001\u88c5\u7bb1\u3001\u62c6\u7bb1\u4e0e\u5bf9\u8c61\u7c7b\u578b\u8f6c\u6362 \u6211\u4eec\u77e5\u9053\uff0c\u4f7f\u7528\u53d8\u91cf\u4e4b\u524d\u8981\u5b9a\u4e49\uff0c\u5b9a\u4e49\u4e00\u4e2a\u53d8\u91cf\u65f6\u5fc5\u987b\u8981\u6307\u660e\u5b83\u7684\u6570\u636e\u7c7b\u578b\uff0c\u4ec0\u4e48\u6837\u7684\u6570\u636e […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[17],"tags":[37],"_links":{"self":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/112"}],"collection":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=112"}],"version-history":[{"count":7,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/112\/revisions"}],"predecessor-version":[{"id":2085,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/112\/revisions\/2085"}],"wp:attachment":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=112"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=112"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=112"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}