See this for detailed description. In Java, parameters are always passed by value. For example, following program prints i = 10, j = 20.
java
public class Test {
public static void swap(Integer i, Integer j) {
Integer temp = new Integer(i);
i = j;
j = temp;
}
public static void main(String[] args) {
Integer i = new Integer( 10 );
Integer j = new Integer( 20 );
swap(i, j);
System.out.println( "i = " + i + ", j = " + j);
}
}
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