再学Java 之解决No enclosing instance of type * is accessible

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再学Java 之解决No enclosing instance of type * is accessible

深夜,临睡前写了个小程序,出了点小问题 public class Test_drive { public static void main(String[] args){ A a = new A(); //报错 B b = new B(); //报错 System.out.println(b instanceof A); } class A{ int a; } class B extends A{ } } 上面两个语句报错信息如下: No enclosing instance of type T…

解决No enclosing instance of type * is accessible

写一个内部类,并在构造函数中初始化时,遇到报错,搜索问题后发现,有网友出现过类似的问题,下面这个是说的浅显明白的,并确实解决了问题.于是,以下内容照搬过来,不再多费键盘了. public class Test_drive { public static void main(String[] args){ A a = new A(); //报错 B b = new B(); //报错 System.out.println(b instanceof A); } class A{ int a; } c…

No enclosing instance of type is accessible. Must qualify the allocation with an enclosing instance of type LeadRestControllerTest (e.g. x.new A() where x is an instance of ).

java - No enclosing instance is accessible. Must qualify the allocation with an enclosing instance of type (e.g. x.new A() where x is an instance of ) - Stack Overflow https://stackoverflow.com/questions/47541459/no-enclosing-instance-is-accessible-m…

java中"no enclosing instance of type * is accessible"的解决方法

这种情况一般发生在“在静态方法里面使用内部类” 测试代码: public class Test { public static void main(String[] args) { A a = new A(1); } class A { int x; public A() {} public A(int x) { this.x = x; } } } 上面这份代码在main函数里面会发生编译错误,为了解决问题,让我们先看看编译器的提示: 编译器告诉我们,没有可访问的Test类的实例,意味着下面将要…

Java中报错No enclosing instance of type caiquan is accessible. Must qualify the allocation with an enclosing instance of type caiquan (e.g. x.new A() where x is an instance of caiquan).

package test;import java.util.Scanner;import java.util.Random;public class caiquan { public static void main(String[] args){ Game g=new Game(); g.begin(); } //将这个类定义为静态就好了,也就说改成 static class Game class Game{ public void begin(){ System.out.println("*…

再学Java 之 interface的成员变量

前言:最近在学多线程,写“哲学家就餐问题(Dining Philosophers)”的时候,需要定义一个全局的变量,即哲学家的人数.常用的做法是在其中一个类中定义一个static final的变量,然后让其他类通过类名访问他.在这里,想使用之前实训项目的第一版应用层协议的设计想法,即使用一个接口类来定义所有子类都会使用到的变量.然后,就引出了一个interface成员变量和static final的问题. (一)一个简单的问题首先,看一段代码: //Variable.java public i…

Java中的static(1)【持续更新】——关于Eclipse的No enclosing instance of type ... 错误的理解和改正

No enclosing instance of type SomeClass is accessible. Must qualify the allocation with an enclosing instance of type SomeClass (e.g. x.new A() where x is an instance of SomeClass). 这是怎么发现的?? 拿Eclipse编写Java的AWT/Swing程序时,编写了一个public class MainFrame ex…