Null pointer Exception

[uhdam]

Hi..

I get a null pointer exception error. Please give me a solution as how to access this. The code snippet is as follows.

 public class x
{
    private String y;
 
    public String gety()
    {
        return y;
    }
 
    public void sety(String m)
    {
        this.y = m ;
    }
 
}
 
 
public class a
{
 
    x ax = new x();
    ax.sety("Hai");
 
}
 
 
public class z
{
    a az = new a();
    System.out.println(za.ax.gety()); //null Pointer exeption
 
}

[r035198x]

Are you sure that your code compiles?
Also read the NullPointerException article.

[uhdam]

Yes sir.. it does...

[r035198x]

Classes a and z do not compile.

[JosAH]

@uhdam
Don't lie. The code you've shown us doesn't compile; no discussion about it.

kind regards,

Jos

[devgupta01]

@uhdam
Correct code for class a and claas z as follows -

 
public class Z {
    public static void main(String a[]){
        A az = new A();
System.out.println(az.ax.getY()); //null Pointer exeption
  }
}
 
class A
{
    X ax;
    A(){
    ax = new X();
    ax.setY("Hai");
      }
 
}
 
 
class X
{
    private String y;
 
    public String getY()
    {
        return y;
    }
 
    public void setY(String m)
    {
        this.y = m ;
    }
 
}
 
 

Now I think urn code will compile and run...