[英]Modifying Outer Class attribute in with Inner Class Java
我想在主 class 中有內部類。 一個屬性是 innerClassId,我無法在內部 class 中更改它。 代碼:
public class OuterClass {
public static String innerClassId = "";
public class InnerClass {
innerClassId = "";
}
}
它一直說“語法錯誤,插入“ClassBody”以完成 ClassDeclarationJava(1610612976)”
這是初始化的一些變體:
public class OuterClass {
public static String innerClassId = "one";
public class InnerClass {
{
innerClassId = "two";
}
public InnerClass() {
innerClassId = "three";
}
public InnerClass(int j) {
//we'll ignore j here (but initializer code runs)
}
public InnerClass(String s) {
innerClassId = s;
}
}
public static void main (String[] args) {
OuterClass oc = new OuterClass();
System.out.println(OuterClass.innerClassId);
InnerClass ic = new OuterClass().new InnerClass(0);
System.out.println(OuterClass.innerClassId);
ic = new OuterClass().new InnerClass();
System.out.println(OuterClass.innerClassId);
ic = new OuterClass().new InnerClass("four");
System.out.println(OuterClass.innerClassId);
}
}
印刷
one
two
three
four
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.