Declaring constructor method public or private. What's the point?

Question

My book declares the constructor method public. I tried declaring it private, and without any modifier out of curiousity. It runs exactly the same. What's the point of doing so?
public class test
     public static void main( String[] args )
          test fun = new test();
          test fun2 = new test(2);     
          System.out.println( fun );
//          System.out.println( test.toString() );
     public String toString()
          return "This is the toString";
     test()
          System.out.println( "This is the constructor method" );
     test( int x )
          System.out.println( "This is the constructor method: " +x );
}

Answer 1

yougene wrote:
I'm new to OOP so maybe I'm not completely grasping the terminology. But this program works just fine with my class.
public class test2
     public static void main( String[] args )
          test foo = new test();
}It gives me the following output
----jGRASP exec: java test2
This is the constructor method
----jGRASP: operation complete.The constructor method is executing from an outside class. I tried this with and without the private modifier on the constructor. Same result.Try compiling this.
public class C1 {
  private C1() {
    System.out.println("C1 c'tor");
public class C2 {
  public void foo() {
    C1 c1 = new C1();
}