Differenziate between int and Integer parameter when using reflection to call a method

Question

public void getData(int i){
    System.out.println("1");
}
public void getData(Integer i){
    System.out.println("2");
}

The following line of code

this.getClass().getMethod("getData",Integer.class).invoke(this, 10);

prints 2 , how to make it print 1?

The title is misleading. IMHO something like "Distinguish int and Integer parameters when invoking method via reflection" would be accurate. — Axel
– Axel, Commented Jun 6, 2014 at 13:56

Axel · Accepted Answer · 2014-06-06 13:52:33Z

5

You are requesting the method that accepts an Integer. Change that to the one that takes an int and you are done:

this.getClass().getMethod("getData",int.class).invoke(this, 10);

Note that there as int.class although int is a primitive type. It exists exactly for this reason.

answered Jun 6, 2014 at 13:52

Axel

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2 Comments

The same value is also available as the public static final constant TYPE in the Integer class.

@lpratlong Thanks for the ideone example.