Two string references pointing to the same object

Question

Look at the following code snippet         String   s1 = "hello";
        String   s2 = "world";
        String   s3 = "welcome";
        String   s4 = "here";
        String   s5 = "hello";
  They say that references s1 and s5 point to the same object "hello".
At run time after creating objects from s1 to s4 how the Java run time knows that there is already an object "hello" and assigns a differernt reference.

Answer 1

When the jvm load the class file, all suchconstants
found in the class are loaded in a global constant
pool. when you assign the constant to a variable,it
uses the same one from the constant pool.Suppose I intialize a string by getiing input
nput from the console which already exists, in that
case a new object will be created or the existing one
be used.A new object will always be created in that case, but you can get a reference to the string in the pool by calling intern. See the javadoc for intern in the String class.
Kaj