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public class OuterClass {
    public void display() {
        System.out.println("This is the outer class display method");
    }
    class InnerClass {
        public void display() {
            System.out.println("This is the inner class display method");
        }
    }
    public static void main(String[] args) {
        OuterClass outer = new OuterClass();
        outer.display();
        OuterClass.InnerClass inner = outer.new InnerClass();
        inner.display();
    }
}