Answers for "inner classes in java"

using class in java

public class HelloWorld {
  public static void main(String[] args) {
    
    // how to use class in java
    class User{
    	
    	int score;
    	
    	// method that can be used outside the class
    	public boolean hasWon(){
    		if(score >= 100){
    			return true;
    		} else {
    			return false;
    		}
    	}
    }
    
    User dave = new User();
    
    dave.score = 20;
    
    System.out.println(dave.hasWon());
    
 
  }
}

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.

java standard inner class

public class OuterClass {
    public class InnerClass {
    }

    public InnerClass instantiate() {
        return new InnerClass();
    }
}