Call Method by String

[john tindell]

Hey I'm wondering if it is possible to call a method from a its own class by the function name or something similar

Eg

public class Xyz
{
    public void foo()
    {
        this.cassMethodFunction("bar")
    }
    public void bar()
    {
        System.out.println("Hello World!");
    }
}

[DeadEyes]

I quickly threw this together it's a bit messed up but seems to do what you want

import java.lang.reflect.*;
public class EditCanvas{

	public EditCanvas(){
		try {
			Method m = this.getClass().getDeclaredMethod("printit",(Class[])null);
			try {
				m.invoke(this,(Object[])null);
			} catch (IllegalArgumentException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (IllegalAccessException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (InvocationTargetException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		} catch (SecurityException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (NoSuchMethodException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	
	public void printit(){
		System.out.println("test");
	}
	public static void main(String[] args) {
		EditCanvas c = new EditCanvas();
	}


}

[x-ice]

All that isn't necessary.

public class methodCalling
{
    public void methodOne()
    {
        System.out.println("Hello, world!");
    }

    public void methodTwo()
    {
        //Call 'methodOne'
        methodOne();
    }
}

Tried and tested it, it does exactly what you want.

[DeadEyes]

He doesn't want to call the method the normal way. He wants to use a string value to call the method by name.

[System_Error]

Reflection is your friend

[john tindell]

Cheers DeadEyes, haven't been able to test it out yet because im away for the weekend, but it looks exaclty like what i want.

Thanks