testing inheritance and abstract classes in java

Test/test.java

@@ -1,11 +1,41 @@
 import java.util.List;
 import java.util.Arrays;
 
-// import java.util.LinkedList;
-// import java.util.Queue;
-
 public class Test {
 	public static void main(String[] args) {
-		System.out.println("Hello");
+		Child child = new Child();
+		child.hello();
+		child.hi();
+		child.sup();
+		System.out.println(child.n);
+	}
+}
+
+abstract public class Mother {
+	public int n;
+	public Mother() {
+	}
+	public Mother(int n) {
+		this.n = n;
+	}
+	abstract public void hello();
+	public void hi() {
+		System.out.println("hi");
+	}
+}
+
+public class Child extends Mother {
+	public Child() {
+	}
+	public Child(int n) {
+		super(n);
+	}
+
+	@Override
+	public void hello() {
+		System.out.println("hello");
+	}
+	public void sup() {
+		System.out.println("sup");
 	}
 }