I was studying Strings in Java can anyone tell me if we write
String s = "deepak";
will this create an object in string constant pool or not because we are not using new keyword here so according to me object will not be created?
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1 Answer
String s = "deepak"; will try to reuse a String. If it already exists in the String pool then that object will be used. If it doesn't exists, obviously a new object will be created.
String s = new String("deepak"); will always create a new String which won't be added to the String pool.
A simple test to confirm it (reminder: == compares object references):
public static void main(String args[]) {
String a = new String("test");
String b = new String("test");
String c = "test";
String d = "test";
System.out.println(a == b);
System.out.println(b == c);
System.out.println(c == d);
}
Output:
false
false
true
In case if you want to read more about this mechanism, it is called String Interning.
