What is tue different between 1 and 2??

Question

1)public class Marks {
private String color;
public String getMark() {
return color;
}
public void setApp(String x) {
this.color = x;
}
}

public class Program
{
public static void main(String[] args) {
Marks v = new Marks();
v.setApp("strong");
System.out.println(v.getMark());
}
}
2)public class Marks {
public String getMark() {
return color;
}
public void setApp(String x) {
this.color = x;
}
}

public class Program
{
public static void main(String[] args) {
Marks v = new Marks();
v.setApp("strong");
System.out.println(v.getMark());
}
}

Answer 1

2nd one is missing declaration of variable color.

Answer 2

In 2nd you dont have color variable. Then how can u use getter and setter (getMark(), setMatk()) on it.
Because these two methods assign and return the color variable.

Your 2nd program shows error