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Concatenation

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Definition:

Concatenation describes the operation of joining two strings together. In Java, the operator "+" normally acts as an arithmetic operator unless one of its operands is a String. If necessary it converts the other operand to a String before joining the second operand to the end of the first operand.

Examples:

To join the two Strings "pan" and "handle":

 System.out.println("pan" + "handle"); 

If one of the operands is not a String it will be converted:

 int age = 12; 
 System.out.println("My age is " + age); 

There is also a method called concat defined in the String class that performs the same operation:

 System.out.println("pan".concat("handle")); 

Glossary:

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