Wrapper Classes

5. Program

//Find what it gives Compiletion Error / Compiletion Successfully / Output ?
class M5
{
 public static void main(String[] args)
 {
  String s1 = "10";
  Integer obj = new Integer(s1);
  int i = obj.intValue();
  System.out.println("done");
 }
}

---

6. Program

//Find what it gives Compiletion Error / Compiletion Successfully / Output ?
class M6
{
 public static void main(String[] args)
 {
  String s1 = "9.989";
  Double d1 = new Double(s1);
  double d2 = d1.doubleValue();
  
  System.out.println(s1);
  System.out.println(d2);
  System.out.println("done");
 }
}

---

7. Program

//Find what it gives Compiletion Error / Compiletion Successfully / Output ?
class M7
{
 public static void main(String[] args)
 {
  String s1 = "10Z";
  Byte b1 = new Byte(s1);
  byte b2 = b1.byteValue();
  System.out.println("done");
 }
}

---

8. Program

//Find what it gives Compiletion Error / Compiletion Successfully / Output ?
class M8
{
 public static void main(String[] args)
 {
  String s1 = "true";
  String s2 = "false";
  String s3 = "abc";
  Boolean b1 = new Boolean(s1);
  Boolean b2 = new Boolean(s2);
  Boolean b3 = new Boolean(s3);
  boolean b4 = b1.booleanValue();
  boolean b5 = b2.booleanValue();
  boolean b6 = b3.booleanValue();
  
  System.out.println(b4);
  System.out.println(b5);
  System.out.println(b6);
 } 
}

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