Lab Da 4 - DA4 PDF

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JAVA PROGRAMMING Lab DA 4 NAME : HENIL SATRA

COURSE : CSE1007

REG. NO. : 18BCE2281

SLOT : L23 + L24

Exceptions : 1. Arithmetic Exception Code : class ArithmeticException18BCE2281 { public static void main(String args[]) { try { int a = 30, b = 0; int c = a/b; System.out.println ("Result = " + c); } catch(ArithmeticException e) { System.out.println ("Can't divide a number by 0"); } } } Output :

2. Null Pointer Exception Code : class NullPointer18BCE2281 { public static void main(String args[]) { try { String a = null; System.out.println(a.charAt(0)); } catch(NullPointerException e) { System.out.println("NullPointerException has occured"); } } } Output :

3. Number Format Exception Code : class NumberFormat18BCE2281 { public static void main(String args[]) { try { int num = Integer.parseInt ("aditya") ; System.out.println(num); } catch(NumberFormatException e) { System.out.println("Number format exception"); } Output :

4. Array Index Out Of Bound Exception Code : class ArrayIndexOutOfBound18BCE2281 { public static void main(String args[]) { try{ int a[] = new int[5]; a[6] = 9; } catch(ArrayIndexOutOfBoundsException e){ System.out.println ("Array Index is Out Of Bounds"); } } } Output :

5. Multiple Catch : Code : class MultipleCatch18BCE2281 { public static void main(String[] args) { try{ int a[]=new int[5]; a[5]=30/0; } catch(ArithmeticException e) { System.out.println("Arithmetic Exception occurs"); } catch(ArrayIndexOutOfBoundsException e) { System.out.println("ArrayIndexOutOfBounds Exception occurs"); } catch(Exception e) { System.out.println("Parent Exception occurs"); } System.out.println("rest of the code"); } }

Output :

6. Nested Try Code: class nestedTry18BCE2281{ public static void main(String args[]){ try{ try{ System.out.println("going to divide"); int b =18/0; }catch(ArithmeticException e){System.out.println(e);} try{ int a[]=new int[5]; a[5]=4; }catch(ArrayIndexOutOfBoundsException e){System.out.println(e);} System.out.println("other statement"); }catch(Exception e){System.out.println("handeled");} System.out.println("normal flow.."); } } Output :

7. Finally without exception handled Code : class TestFinally18BCE2281 { public static void main(String args[]){ try{ int data=25/0; System.out.println(data); } catch(NullPointerException e){System.out.println(e);} finally{System.out.println("finally block is always executed");} System.out.println("rest of the code..."); } } Output :

8. Finally with exception handled Code : class FinallyBlock18BCE2281{ public static void main(String args[]){ try{ int data=25/0; System.out.println(data); }

catch(ArithmeticException e){System.out.println(e);} finally{System.out.println("finally block is always executed");} System.out.println("rest of the code..."); } } Output :

9. Throw Exception Code : class TestThrow18BCE2281{ static void validate(int age){ if(age...