一、Java成員內部類的例項化

OuterClass outerClass = new OuterClass();

OuterClass.InnerClass innerClass = outerClass.new InnerClass();

其中OuterClass為外部類，InnerClass為成員內部類。

二、內部類序列化

package com.iflytek.chy;
import java.util.ArrayList;
import java.util.List;
import com.alibaba.fastjson.JSON;
public class OuterClassJson {
private String name;
private int age;
private D1 d1;
private List<D2> d2 = new ArrayList<>();
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public D1 getD1() {
return d1;
}
public void setD1(D1 d1) {
this.d1 = d1;
}
public List<D2> getD2() {
return d2;
}
public void setD2(List<D2> d2) {
this.d2 = d2;
}
public class D1 {
private String a1;
private int b1;
public String getA1() {
return a1;
}
public void setA1(String a1) {
this.a1 = a1;
}
public int getB1() {
return b1;
}
public void setB1(int b1) {
this.b1 = b1;
}
}
public class D2 {
private String a2;
private int b2;
public String getA2() {
return a2;
}
public void setA2(String a2) {
this.a2 = a2;
}
public int getB2() {
return b2;
}
public void setB2(int b2) {
this.b2 = b2;
}
}
public static void main(String[] args) {
OuterClassJson outClass = new OuterClassJson();
OuterClassJson.D1 e = outClass.new D1();
OuterClassJson.D2 f = outClass.new D2();
OuterClassJson.D2 g = outClass.new D2();
e.a1 = "張三1111";
e.b1 = 30;
f.a2 = "李四22222";
f.b2 = 40;
g.a2 = "李四3333";
g.b2 = 44;
outClass.name = "王五555";
outClass.age = 50;
outClass.d1 = e;
outClass.d2.add(f);
outClass.d2.add(g);
String str = JSON.toJSONString(outClass);
System.out.println(str);
}
}