what is inner class in java
1. Can Outer class be static? --> No
2. Can inner class be static? --> Yes
3. Can you create an object from the inner class? --> Only if it's static
4. Can we have main method in inner class ? --> Only if it's static
5. Inner class can only be extended if it's static.use of nested class in java
In Java, it is possible to define a class within another class, such
classes are known as nested classes. They enable you to logically group
classes that are only used in one place, thus this increases the use of
encapsulation, and creates more readable and maintainable code.are inner classes inherited
//Only fields and methods are inherited.
//Inner class can extend it's outer class.
//... Because, even the private members of outer
//class are available inside the inner class.
//Even though, When an inner class extends its outer class,
//only fields and methods are inherited but not inner class
//itself.inner class baeldung
public class Enclosing {
private static int x = 1;
public static class StaticNested {
private void run() {
// method implementation
}
}
@Test
public void test() {
Enclosing.StaticNested nested = new Enclosing.StaticNested();
nested.run();
}
}java standard inner class
public class OuterClass {
public class InnerClass {
}
public InnerClass instantiate() {
return new InnerClass();
}
}Copyright © 2021 Codeinu
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