In this tutorial basic introduction to Class and its Elements such as Constructors and\u00a0 How to perform Function Overloading\u00a0 in Core Java\u00a0 is shown.<\/p>\n
Code:<\/p>\n
Demo.java<\/p>\n
class Number
\n{
\nint a,b;
\nstatic int count=0;
\npublic final static String str=”Hello”;<\/p>\n
Number()
\n{
\na=b=0;
\ncounter();
\n}<\/p>\n
Number(int x)
\n{
\na=b=x;
\ncounter();
\n}<\/p>\n
Number(int a,int b)
\n{
\nthis.a=a;
\nthis.b=b;
\ncounter();
\n}<\/p>\n
public static void counter()
\n{
\ncount++;
\n}<\/p>\n
public static int getcount()
\n{
\nreturn count;
\n}<\/p>\n
public void insert(int x)
\n{
\na=b=x;
\n}<\/p>\n
public void insert(int a,int b)
\n{
\nthis.a=a;
\nthis.b=b;
\n}<\/p>\n
public void insert(Number n)
\n{
\nthis.a=n.a;
\nthis.b=n.b;
\n}<\/p>\n
public void display()
\n{
\nSystem.out.println(“a: “+a);
\nSystem.out.println(“b: “+b);
\n}<\/p>\n
protected void finalize()
\n{
\nSystem.out.println(“Finalize method”);
\n}<\/p>\n
}<\/p>\n
public class Demo
\n{
\npublic static void main(String args[])
\n{
\nNumber n1=new Number();
\nSystem.out.println(“No of Objects: “+Number.getcount());<\/p>\n
Number n2=new Number(3);
\nSystem.out.println(“No of Objects: “+Number.getcount());<\/p>\n
Number n3=new Number(4,5);
\nSystem.out.println(“No of Objects: “+Number.getcount());<\/p>\n
System.out.println(“n1 data”);
\nn1.insert(5);
\nn1.display();<\/p>\n
System.out.println(“n2 data”);
\nn2.insert(10,15);
\nn2.display();<\/p>\n
System.out.println(“n3 data”);
\nn3.insert(12,20);
\nn3.display();<\/p>\n
System.out.println(“n3 data after change”);
\nn3.insert(n2);
\nn3.display();<\/p>\n
System.out.println(“String: “+ Number.str);<\/p>\n
}
\n}<\/p>\n