toString in java - System.out.println vs log in Android

Question

Lets assume i have the following class definition:

class Test{
    public String toString(){

        return "hello test";
    }

Now from another class i do the following:

Test myTest=new Test();
//output of below will be 'hello test'
System.out.println(myTest);

I am looking for the equivalent in Android so i could do something like this on objects:

Log.d("TAG",myTest);  
or even createToast(Context,myTest,Toast.short).show();

I dont want to have to call the objects toString method, i just want to dump the object into the method and it knows it needs to call toString just like system.out.println did.

Answer 1

since Log.X only takes a String as second parameter, you'd better do a wrapper that calls the Android logger, something like:

static class MyLogger{
        public static void d(String tag,Object o){
            if(o==null){
                throw new NullPointerException("The second parameter can not be null");
            }
            Log.d(tag, o.toString());
        }
    }

Answer 2

adding an object to a string will adds its "toString" method without your call to it

Log.d("TAG", "" + myTest);

or even

createToast(Context, "" + myTest,Toast.short).show();