Ronen boss

some App's are not supporting in my iphone , is there any solution for solve that problem ?

Hi, thinks for your reply , Even i got some points from your blog thank you so much

The most common reason for using the this keyword is because a field is shadowed by a method or constructor parameter.

For example, the Point class was written like this

public class Point {
public int x = 0;
public int y = 0;

//constructor
public Point(int a, int b) {
x = a;
y = b;
}
}

but it could have been written like this:

public class Point {
public int x = 0;
public int y = 0;

//constructor
public Point(int x, int y) {
this.x = x;
this.y = y;
}
}

Each argument to the constructor shadows one of the object's fields — inside the constructor x is a local copy of the constructor's first argument. To refer to the Point field x, the constructor must use this.x.