Constructor and this use in java

constructors_and_this_use_sample.java

@@ -0,0 +1,42 @@
+//THIS IS A SAMPLE OF USING CONSTRUCTOR INT JAVA BOTH DEFAULT AND THE PARAMTERISED CONSTRUCTOR
+
+
+import java.util.*;
+public class Program
+{
+    public static class Person
+        {
+            int age;
+            String name;
+            void saysHi()
+            {
+                System.out.println(name+" ["+age+"] says hi");
+            }
+            //default constructor
+            Person()
+            {
+
+            }
+            //BOTH THE PARAMETRISED AND DEFAULT CONSTRUCTOR ARE NEEDED IF WE WRITE THE PARAMETRISED CONSTRUCTOR.
+            //parameterised constructor 
+            Person(int age,String name)
+            {
+                this.name=name;
+                this.age=age;
+                //this. used for the calling the heap constructed in the stack when we below wrtie the new Person
+            }
+        }
+    public static void main(String[] args) 
+    {
+
+        Person p1=new Person();
+        p1.age=19;
+        p1.name="Jiya";
+        p1.saysHi();
+
+        Person p2=new Person(20,"Nishi");
+        p2.saysHi();
+
+
+	}
+}