String

[John Mathew]

The statement ...

String s = "Hello" + "Java";

yields the same value for s as ...

String s = "Hello";
String s2= "Java";
s.concat( s2 );

[Vassili Vladimir]

Pay very well attention to these statements Dear John,

In the first one, s will contain "Hello Java"

Where in the second one, when saying

    
s.concat( s2 );

This String literal will be lost!

s will contain "Hello" only!

For more about Strings and immutability, please refer to the great material enclosed in the K&B book., you will understand everything clearly ...

Best of luck ...

[marc weber]

Here's a cool trick...

class Test {
  public static void main(String[] args) {
    //insert code here...
  }
}