Final Keyword

1. Program

//Find what it gives Compiletion Error / Compiletion Successfully / Output ? 
class A
{
 public static void main(String a[])
 {
  final int i = 10;
  int j =20;
  System.out.println(i);
  System.out.println(j);
  System.out.println("-------");
  System.out.println(i);
  System.out.println(j);
  System.out.println("-------");
  i = 10;
  j = 20;
  System.out.println(i);
  System.out.println(j);
 }
}

---

2. Program

//Find what it gives Compiletion Error / Compiletion Successfully / Output ? 
class B
{
 public static void main(String a[])
 {
  final int i;
  i = 10;
  System.out.println(i);
 // i = 10;   Final variable cant be reintialize....
  System.out.println(i);
 }
}

---

3. Program

//Find what it gives Compiletion Error / Compiletion Successfully / Output ? 
class C
{
 public static void main(String a[])
 {
  final int i = 10;
  int j = i;
  System.out.println(i);
  System.out.println(j);
  j = (i + 10);
  System.out.println(i);
  System.out.println(j);
 }
}

---

4. Program

//Find what it gives Compiletion Error / Compiletion Successfully / Output ? 
class D
{
 public static void main(String a[])
 {
  final int i = 0;
  i++;
  System.out.println(i);
 }
}

---

5. Program

//Find what it gives Compiletion Error / Compiletion Successfully / Output ? 
class E
{
 public static void main(String a[])
 {
  final E e1 = new E();
  e1 = null; // Here e1 is final reference variable it cant be changed...
  System.out.println("done");
 }
}

---

6. Program

//Find what it gives Compiletion Error / Compiletion Successfully / Output ? 
class F
{
 public static void main(String a[])
 {
  F f1 = new F();
  final F f2 = new F();
  f2 = f1; 
  System.out.println("done");
 }
}

---

7. Program

//Find what it gives Compiletion Error / Compiletion Successfully / Output ? 
class G
{
 public static void main(String a[])
 {
  final String s1 = "abc";
  s1 = "abc";
  System.out.println("done");
 }
}

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