设置实例变量与方法参数同名吗？

Question

If I have code like this:

public class Foo {
    public int bar;

    public void setBar(int bar) {
        bar = bar;
    }
}

Eclipse warns me that the assignment doesn't do anything (for obvious reasons). Can I fix it by changing it to this.bar = bar; or is it best to just use a different variable name?

Answer 1

Using this.bar = bar; is just fine. Most setters are coded this way.

Answer 2

When you need to do something like that, one common course of action is to rename the function parameter.

public void setBar(int theBar) {
    bar = theBar;
}

If you would rather not do that, use this. prefix, like this:

this.bar = bar;