Java – what is the best practice for using “this” in classes in OOP?

What I've been thinking about is the preferred course in which you can use 'this [name]' or a simple [name] reference member?

For example, in Java:

public class foo {
    public int bars = 0;
    private void incrementBars(){
        bars++;
    }
}

and

public class foo {
    public int bars = 0;
    private void incrementBars(){
        this.bars++;
    }
}

"Seems" to have the same effect

In the case where I instantiate multiple instances of class foo, so far, I will do something similar to

for (foo f : listOfFoos){
    f.incrementBars();
}

It still seems to work

Is this technically ambiguous?

Solution

Use this in the case of variable shadowing

class MyClass{
        int i;//1
        public void myMethod(){
            i = 10;//referring to 1    
        }

        public void myMethod(int i){//2
            i = 10;//referring to 2
            this.i = 10 //refering to 1    
        }    
    }

Sometimes this will make the code more readable because of our English mentality