Please find the reason of error

Question

class Equal_1 {
private String name;
Equal_1 eq1 = new Equal_1("raaga");
String eq1_name = eq1.name;
public Equal_1 getInstance() {
return eq1;
public Equal_1(String name) {
this.name = name;
public boolean equals(Equal_1 o) {
if(o.name .equals(this.name) ) {
return true;
else
return false;
public class check_Equal {
public static void main(String[] args) {
int i_1 = 12;
int i_2 = 12;
Equal_1 eq2 = new Equal_1("get_ins");
System.out.println("res : "+eq2.getInstance());
Exception in thread "main" java.lang.StackOverflowError
at Equal_1.<init>(check_Equal.java:6)
at Equal_1.<init>(check_Equal.java:6)

Answer 1

The reason is infinite recursion in the constructor.
Is this what you want perhaps?
Equal_1 eq1;
String eq1_name;
public Equal_1 getInstance() {
  eq1 = new Equal_1("raaga");
  eq1_name = eq1.name;
  return eq1;
}