Final Parameters in Java

Final Parameters

A Java method parameter can be declared final, just like a variable. The value of a final parameter cannot be changed. That is, if the parameter is a reference to an object, the reference cannot be changed, but values inside the object can still be changed. Here is an example:

public void writeText(final String text1, final String text2) {
    System.out.print(text1);    // read value of text1 parameter.
    System.out.print(text2);    // read value of text2 parameter.
}

In this method example you cannot reassign the parameters text1 and text2 to any other Strings than the ones passed as parameters when the method was called.

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Java Methods