Java \u6784\u9020\u51fd\u6570<\/h1>\n<\/p><\/div>\n
\n Java\u4e2d\u6709\u4e24\u79cd\u6784\u9020\u51fd\u6570:\n <\/div>\n
\u9ed8\u8ba4\u6784\u9020\u51fd\u6570(\u65e0\u53c2\u6570\u6784\u9020\u51fd\u6570)<\/span>
\n \u53c2\u6570\u5316\u6784\u9020\u51fd\u6570<\/span>
\n $Java \u6784\u9020\u51fd\u6570_https:\/\/bianchenghao6.com_\u3010Java \u57fa\u7840\u6559\u7a0b\u3011_\u7b2c1\u5f20$ <\/p>\n
Java\u9ed8\u8ba4\u6784\u9020\u51fd\u6570<\/h2>\n
\n \u5982\u679c\u6784\u9020\u51fd\u6570\u4e0d\u5b58\u5728\uff0c\u5219\u79f0\u4e3a\"\u9ed8\u8ba4\u6784\u9020\u51fd\u6570\"\u6ca1\u6709\u4efb\u4f55\u53c2\u6570\u3002\n <\/div>\n
\u9ed8\u8ba4\u6784\u9020\u51fd\u6570\u7684\u8bed\u6cd5: <\/h3>\n
 <class_name>(){} <\/span><\/code><\/pre>\n<\/p><\/div>\n\u9ed8\u8ba4\u6784\u9020\u51fd\u6570\u793a\u4f8b<\/h2>\n\n\n\n\u5728\u6b64\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5728Bike\u7c7b\u4e2d\u521b\u5efano-arg\u6784\u9020\u51fd\u6570\u3002\u5c06\u5728\u521b\u5efa\u5bf9\u8c61\u65f6\u8c03\u7528\u5b83\u3002 <\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n \/\/Java Program to create and call a default <\/span>constructor
 class <\/span>Bike1{
     \/\/creating a default <\/span>
     constructorBike1(){
         System.out.println<\/span>(\"Bike is created\"<\/span>);
     }
     \/\/main method
     public <\/span>static void <\/span>main(String args[]){
         \/\/calling a default <\/span>
         constructorBike1 b=new Bike1();
     }
 }
 <\/span><\/code><\/pre>\n<\/p><\/div>\n\n    \u8f93\u51fa:\n  <\/div>\n\n Bike is created
 <\/span><\/code><\/pre>\n<\/p><\/div>\n\n\n    \u6ce8\u610f: <\/span>\u89c4\u5219: \u5982\u679c\u7c7b\u4e2d\u6ca1\u6709\u6784\u9020\u51fd\u6570\uff0c\u5219\u7f16\u8bd1\u5668\u4f1a\u81ea\u52a8\u521b\u5efa\u4e00\u4e2a\u9ed8\u8ba4\u6784\u9020\u51fd\u6570\u3002\n   <\/div>\n<\/h4>\n   <\/p>\n
 Q)\u7684\u76ee\u7684\u662f\u4ec0\u4e48<\/h3>\n\n    \u9ed8\u8ba4\u6784\u9020\u51fd\u6570\u7528\u4e8e\u6839\u636e\u7c7b\u578b\u4e3a\u5bf9\u8c61\u63d0\u4f9b\u9ed8\u8ba4\u503c\uff0c\u4f8b\u59820\uff0cnull\u7b49\u3002\n  <\/div>\n\u793a\u4f8b\u663e\u793a\u9ed8\u8ba4\u503c\u7684\u9ed8\u8ba4\u6784\u9020\u51fd\u6570<\/h3>\n\n \/\/Let us see another example of default <\/span>constructor
 \/\/which displays the default <\/span>values
 class <\/span>Student3{
     int <\/span>id;
     String name;
     \/\/method to display the value of id and namevoid
     display(){
         System.out.println<\/span>(id+\" \"<\/span>+name);
     }
     public <\/span>static void <\/span>main(String args[]){
         \/\/creating objects
         Student3 s1=new Student3();
         Student3 s2=new Student3();
         \/\/displaying values of the 
         objects1.display<\/span>();
         s2.display<\/span>();
     }
 }
 <\/span><\/code><\/pre>\n<\/p><\/div>\n\n    \u8f93\u51fa:\n  <\/div>\n\n 0 null<\/span>
 0 null<\/span> <\/span><\/code><\/pre>\n<\/p><\/div>\n\n   \u8bf4\u660e: <\/strong>\u5728\u4e0a\u9762\u7684\u7c7b\u4e2d\uff0c\u60a8\u6ca1\u6709\u521b\u5efa\u4efb\u4f55\u6784\u9020\u51fd\u6570\uff0c\u56e0\u6b64\u7f16\u8bd1\u5668\u4e3a\u60a8\u63d0\u4f9b\u4e86\u9ed8\u8ba4\u7684\u6784\u9020\u51fd\u6570\u3002\u8fd9\u91cc\u7684\u9ed8\u8ba4\u6784\u9020\u51fd\u6570\u63d0\u4f9b\u4e860\u548cnull\u503c\u3002\n  <\/div>\n
\n    <\/p>\n
 Java\u53c2\u6570\u5316\u6784\u9020\u51fd\u6570<\/h3>\n\n    \u5177\u6709\u7279\u5b9a\u6570\u91cf\u53c2\u6570\u7684\u6784\u9020\u51fd\u6570\u79f0\u4e3a\u53c2\u6570\u5316\u6784\u9020\u51fd\u6570\u3002\n  <\/div>\n\u4e3a\u4ec0\u4e48\u4f7f\u7528\u53c2\u6570\u5316\u6784\u9020\u51fd\u6570\uff1f<\/h3>\n\n    \u53c2\u6570\u5316\u6784\u9020\u51fd\u6570\u7528\u4e8e\u4e3a\u4e0d\u540c\u7684\u5bf9\u8c61\u63d0\u4f9b\u4e0d\u540c\u7684\u503c\u3002\u4f46\u662f\uff0c\u60a8\u4e5f\u53ef\u4ee5\u63d0\u4f9b\u76f8\u540c\u7684\u503c\u3002\n  <\/div>\n\u53c2\u6570\u5316\u6784\u9020\u51fd\u6570\u7684\u793a\u4f8b<\/h3>\n\n    \u5728\u6b64\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u521b\u5efa\u4e86\u5177\u6709\u4e24\u4e2a\u53c2\u6570\u7684Student\u7c7b\u7684\u6784\u9020\u51fd\u6570\u3002\u6784\u9020\u51fd\u6570\u4e2d\u53ef\u4ee5\u6709\u4efb\u610f\u6570\u91cf\u7684\u53c2\u6570\u3002\n  <\/div>\n\n \/\/Java Program to demonstrate the use of the parameterized constructor.class <\/span>Student4{
     int <\/span>id;
     String name;
     \/\/creating a parameterized constructor Student4(int <\/span>i,String n){
         id = i;
         name = n;
     }
     \/\/method to display the values  void <\/span>display(){
         System.out.println<\/span>(id+\" \"<\/span>+name);
     }
     public <\/span>static void <\/span>main(String args[]){
         \/\/creating objects and passing values Student4 s1 = new <\/span>Student4(111,\"Karan\"<\/span>);
         Student4 s2 = new <\/span>Student4(222,\"Aryan\"<\/span>);
         \/\/calling method to display the values of object s1.display<\/span>();
         s2.display<\/span>();
     }
 }
 <\/span><\/code><\/pre>\n<\/p><\/div>\n\n    \u8f93\u51fa:\n  <\/div>\n\n 111 Karan
 222 Aryan <\/span><\/code><\/pre>\n<\/p><\/div>\n
\n Java\u4e2d\u7684\u6784\u9020\u51fd\u6570\u91cd\u8f7d<\/h2>\n\n    \u5728Java\u4e2d\uff0c\u6784\u9020\u51fd\u6570\u5c31\u50cf\u65b9\u6cd5\u4e00\u6837\uff0c\u4f46\u662f\u6ca1\u6709\u8fd4\u56de\u7c7b\u578b\u3002\u5b83\u4e5f\u53ef\u4ee5\u50cfJava\u65b9\u6cd5\u4e00\u6837\u91cd\u8f7d\u3002\n  <\/div>\n\n    \u6784\u9020\u51fd\u6570Java\u4e2d\u7684\u91cd\u8f7d\u662f\u4e00\u79cd\u5177\u6709\u591a\u4e2a\u5177\u6709\u4e0d\u540c\u53c2\u6570\u5217\u8868\u7684\u6784\u9020\u51fd\u6570\u7684\u6280\u672f\u3002\u5b83\u4eec\u7684\u6392\u5217\u65b9\u5f0f\u4f7f\u6bcf\u4e2a\u6784\u9020\u51fd\u6570\u6267\u884c\u4e0d\u540c\u7684\u4efb\u52a1\u3002\u7f16\u8bd1\u5668\u901a\u8fc7\u5217\u8868\u4e2d\u53c2\u6570\u7684\u6570\u91cf\u53ca\u5176\u7c7b\u578b\u6765\u533a\u5206\u5b83\u4eec\u3002\n  <\/div>\n\u6784\u9020\u51fd\u6570\u91cd\u8f7d\u793a\u4f8b<\/h3>\n\n \/\/Java program to overload constructorsclass <\/span>Student5{
     int <\/span>id;
     String name;
     int <\/span>age;
     \/\/creating two arg constructor Student5(int <\/span>i,String n){
         id = i;
         name = n;
     }
     \/\/creating three arg constructor Student5(int <\/span>i,String n,int <\/span>a){
         id = i;
         name = n;
         age=a;
     }
     void display(){
         System.out.println<\/span>(id+\" \"<\/span><\/span>+name+\" \"+age);
     }
     public <\/span>static void <\/span>main(String args[]){
         Student5 s1 = new <\/span>Student5(111,\"Karan\"<\/span>);
         Student5 s2 = new <\/span>Student5(222,\"Aryan\"<\/span>,25);
         s1.display<\/span>();
         s2.display<\/span>();
     }
 }
 <\/span><\/code><\/pre>\n<\/p><\/div>\n\n    \u8f93\u51fa:\n  <\/div>\n\n 111 Karan 0
 222 Aryan 25
 <\/span><\/code><\/pre>\n<\/p><\/div>\n
\n    <\/p>\n
 Java\u4e2d\u7684\u6784\u9020\u51fd\u6570\u4e0e\u65b9\u6cd5\u4e4b\u95f4\u7684\u5dee\u5f02<\/h2>\n\n    \u6784\u9020\u51fd\u6570\u4e0e\u65b9\u6cd5\u4e4b\u95f4\u5b58\u5728\u8bb8\u591a\u5dee\u5f02\u3002\u5b83\u4eec\u5728\u4e0b\u9762\u7ed9\u51fa\u3002\n  <\/div>\n\n\n\n\n\n\n\n\n Java\u6784\u9020\u51fd\u6570<\/td>\n  Java\u65b9\u6cd5<\/td>\n<\/tr>\n
\u6784\u9020\u51fd\u6570\u7528\u4e8e\u521d\u59cb\u5316\u5bf9\u8c61\u7684\u72b6\u6001\u3002<\/td>\n \u4e00\u79cd\u65b9\u6cd5\u7528\u4e8e\u63ed\u793a\u5bf9\u8c61\u7684\u884c\u4e3a\u3002<\/td>\n<\/tr>\n
\u6784\u9020\u51fd\u6570\u4e0d\u5f97\u5177\u6709\u8fd4\u56de\u7c7b\u578b\u3002<\/td>\n \u65b9\u6cd5\u5fc5\u987b\u5177\u6709\u8fd4\u56de\u7c7b\u578b\u3002<\/td>\n<\/tr>\n
\u6784\u9020\u51fd\u6570\u88ab\u9690\u5f0f\u8c03\u7528\u3002<\/td>\n \u8be5\u65b9\u6cd5\u88ab\u663e\u5f0f\u8c03\u7528\u3002<\/td>\n<\/tr>\n
\u5982\u679c\u7c7b\u4e2d\u6ca1\u6709\u4efb\u4f55\u6784\u9020\u51fd\u6570\uff0c\u5219Java\u7f16\u8bd1\u5668\u4f1a\u63d0\u4f9b\u9ed8\u8ba4\u6784\u9020\u51fd\u6570\u3002<\/td>\n \u5728\u4efb\u4f55\u60c5\u51b5\u4e0b\u7f16\u8bd1\u5668\u90fd\u4e0d\u63d0\u4f9b\u8be5\u65b9\u6cd5\u3002<\/td>\n<\/tr>\n
\u6784\u9020\u51fd\u6570\u540d\u79f0\u5fc5\u987b\u4e0e\u7c7b\u540d\u79f0\u76f8\u540c\u3002<\/td>\n \u65b9\u6cd5\u540d\u79f0\u53ef\u4ee5\u4e0e\u7c7b\u540d\u79f0\u76f8\u540c\u6216\u4e0d\u76f8\u540c\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n 
\n  
\n    <\/p>\n
 Java\u590d\u5236\u6784\u9020\u51fd\u6570<\/h2>\n\n    Java\u4e2d\u6ca1\u6709\u590d\u5236\u6784\u9020\u51fd\u6570\u3002\u4f46\u662f\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u503c\u4ece\u4e00\u4e2a\u5bf9\u8c61\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u5bf9\u8c61\uff0c\u4f8b\u5982C ++\u4e2d\u7684\u590d\u5236\u6784\u9020\u51fd\u6570\u3002\n  <\/div>\n\n    \u5728Java\u4e2d\uff0c\u6709\u5f88\u591a\u65b9\u6cd5\u53ef\u4ee5\u5c06\u4e00\u4e2a\u5bf9\u8c61\u7684\u503c\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u5bf9\u8c61\u3002\u4ed6\u4eec\u662f:\n  <\/div>\n  \u901a\u8fc7\u6784\u9020\u51fd\u6570<\/span>
\n  \u901a\u8fc7\u5c06\u4e00\u4e2a\u5bf9\u8c61\u7684\u503c\u5206\u914d\u7ed9\u53e6\u4e00\u4e2a\u5bf9\u8c61<\/span>
\n  \u901a\u8fc7Object\u7c7b\u7684clone()\u65b9\u6cd5<\/span> <\/p>\n
\n    \u5728\u6b64\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5c06\u4f7f\u7528Java\u6784\u9020\u51fd\u6570\u5c06\u4e00\u4e2a\u5bf9\u8c61\u7684\u503c\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u5bf9\u8c61\u4e2d\u3002\n  <\/div>\n\n \/\/Java program to initialize the values from one object to another object.class <\/span>Student6{
     int <\/span>id;
     String name;
     \/\/constructor to initialize integer and string Student6(int <\/span>i,String n){
         id = i;
         name = n;
     }
     \/\/constructor to initialize another object Student6(Student6 s){
         id = s.id;
         name =s.name;
     }
     void display(){
         System.out.println<\/span>(id+\" \"<\/span>+name);
     }
     public <\/span>static void <\/span>main(String args[]){
         Student6 s1 = new <\/span>Student6(111,\"Karan\"<\/span>);
         Student6 s2 = new <\/span>Student6(s1);
         s1.display<\/span>();
         s2.display<\/span>();
     }
 }
 <\/span><\/code><\/pre>\n<\/p><\/div>\n\n    \u8f93\u51fa:\n  <\/div>\n\n 111 Karan
 111 Karan
 <\/span><\/code><\/pre>\n<\/p><\/div>\n
\n\u5728\u6ca1\u6709\u6784\u9020\u51fd\u6570\u7684\u60c5\u51b5\u4e0b\u590d\u5236\u503c<\/h2>\n\n    \u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5c06\u5bf9\u8c61\u7684\u503c\u5206\u914d\u7ed9\u53e6\u4e00\u4e2a\u5bf9\u8c61\u6765\u5c06\u4e00\u4e2a\u5bf9\u8c61\u7684\u503c\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u5bf9\u8c61\u4e2d\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u65e0\u9700\u521b\u5efa\u6784\u9020\u51fd\u6570\u3002\n  <\/div>\n\n class <\/span>Student7{
     int <\/span>id;
     String name;
     Student7(int <\/span>i,String n){
         id = i;
         name = n;
     }
     Student7(){
     }
     void display(){
         System.out.println<\/span>(id+\" \"<\/span>+name);
     }
     public <\/span>static void <\/span>main(String args[]){
         Student7 s1 = new <\/span>Student7(111,\"Karan\"<\/span>);
         Student7 s2 = new <\/span>Student7();
         s2.id=s1.id;
         s2.name=s1.name;
         s1.display<\/span>();
         s2.display<\/span>();
     }
 }
 <\/span><\/code><\/pre>\n<\/p><\/div>\n\n    \u8f93\u51fa:\n  <\/div>\n\n 111 Karan
 111 Karan
 <\/span><\/code><\/pre>\n<\/p><\/div>\n
\n    <\/p>\n
 Q)\u6784\u9020\u51fd\u6570\u662f\u5426\u8fd4\u56de\u4efb\u4f55\u503c\uff1f<\/h3>\n\n    \u662f\uff0c\u5b83\u662f\u5f53\u524d\u7684\u7c7b\u5b9e\u4f8b(\u4e0d\u80fd\u4f7f\u7528\u8fd4\u56de\u7c7b\u578b\uff0c\u4f46\u5b83\u8fd4\u56de\u4e00\u4e2a\u503c)\u3002\n  <\/div>\n
\n    <\/p>\n
\u6784\u9020\u51fd\u6570\u80fd\u5426\u6267\u884c\u5176\u4ed6\u4efb\u52a1\u800c\u4e0d\u662f\u521d\u59cb\u5316\uff1f<\/h3>\n\n    \u662f\u7684\uff0c\u4f8b\u5982\u5bf9\u8c61\u521b\u5efa\uff0c\u542f\u52a8\u7ebf\u7a0b\uff0c\u8c03\u7528\u65b9\u6cd5\u7b49\u3002\u60a8\u53ef\u4ee5\u50cf\u5728\u65b9\u6cd5\u4e2d\u6267\u884c\u64cd\u4f5c\u4e00\u6837\u5728\u6784\u9020\u51fd\u6570\u4e2d\u6267\u884c\u4efb\u4f55\u64cd\u4f5c\u3002\n  <\/div>\n
\n Java\u4e2d\u662f\u5426\u6709\u6784\u9020\u5668\u7c7b\uff1f<\/h3>\n\n    \u662f\u3002\n  <\/div>\n
\n\u6784\u9020\u51fd\u6570\u7c7b\u7684\u7528\u9014\u662f\u4ec0\u4e48\uff1f<\/h3>\n\n    Java\u63d0\u4f9b\u4e86\u4e00\u4e2a\u6784\u9020\u51fd\u6570\u7c7b\uff0c\u53ef\u7528\u4e8e\u83b7\u53d6\u8be5\u7c7b\u4e2d\u6784\u9020\u51fd\u6570\u7684\u5185\u90e8\u4fe1\u606f\u3002\u53ef\u5728java.lang.reflect\u5305\u4e2d\u627e\u5230\u5b83\u3002\n  <\/div>\n <\/body>
\n<\/html><\/p>\n","protected":false},"excerpt":{"rendered":"Java \u6784\u9020\u51fd\u6570zh-cn","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[111],"tags":[],"class_list":["post-717","post","type-post","status-publish","format-standard","hentry","category-java-jichu"],"_links":{"self":[{"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/posts\/717"}],"collection":[{"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/comments?post=717"}],"version-history":[{"count":0,"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/posts\/717\/revisions"}],"wp:attachment":[{"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/media?parent=717"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/categories?post=717"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/tags?post=717"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}