本文介绍了静态方法返回内部类的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我真的不明白为什么下面的getMyClass2方法不能是静态的,为什么它不是有效的Java代码?
I really don't understand why the getMyClass2 method below cannot be static, why isn't it valid Java code?
public class MyClass
{
private class MyClass2
{
public String s1 = "";
public String s2 = "";
}
private MyClass2 myClass2;
private static MyClass2 getMyClass2()
{
MyClass2 myClass2 = new MyClass2();
return myClass2;
}
public MyClass()
{
myClass2 = getMyClass2();
}
}
推荐答案
您必须说内部类是静态的,因为非静态绑定到实例,所以它不能从静态方法中返回
You have to say that the inner class is static because non-static is bound to the instance so it cannot be returned from static method
public class MyClass
{
private static class MyClass2
{
public String s1 = "";
public String s2 = "";
}
private MyClass2 myClass2;
private static MyClass2 getMyClass2()
{
MyClass2 myClass2 = new MyClass2();
return myClass2;
}
public MyClass()
{
myClass2 = getMyClass2();
}
}
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