Exception Handling in Java

1. Exception Handlingin Java Dr. L. Jololian

2. vector<string> ProductName; vector<float> ProductPrice; void main(void) { string name; float price; cout << "Enter name: "; cin >> name; cout << "enter price: "; cin >> price; try { addToInventory(name, price); }

3. catch(string n) { cout << n << " has " << n.length() << " characters" << endl; cout << "Error: name is too long" << endl; } catch(float p) { if( p > 100) cout << "price is too high" << endl; if( p < 0) cout << "price may not be negative" << endl; } } void addToInventory(string nm, float pr) { if( nm.length() > 5) throw nm; if( pr > 100 || pr < 0) throw pr; ProductName.push_back(nm); ProductPrice.push_back(pr); }

4. import javax.swing.*; public class Example1 { public static void main(String[] args) { try { String str1, str2; int num1, num2, result; str1 = JOptionPane.showInputDialog(" first integer"); str2 = JOptionPane.showInputDialog(“second integer"); num1 = Integer.parseInt(str1); num2 = Integer.parseInt(str2); result = num1/num2; JOptionPane.showMessageDialog(null, "The quotient is " + result, "Division", JOptionPane.PLAIN_MESSAGE); } catch (ArithmeticException ex) {

5. } catch (ArithmeticException ex) { JOptionPane.showMessageDialog(null, "Division by 0 has occured", "ERROR", JOptionPane.ERROR_MESSAGE); System.out.println("An error has occured"); } } }

8. import javax.swing.*; public class Example2 { public static void main(String[] args) { try { int arr[] = { 10, 20, 30 }; for(int i=0; i<4; i++) System.out.println(arr[i]); } catch (IndexOutOfBoundsException ex) {

9. } catch (IndexOutOfBoundsException ex) { JOptionPane.showMessageDialog(null, "index out of bound", "ERROR", JOptionPane.ERROR_MESSAGE); System.out.println("An error has occured"); } } }

11. public class Example3 { public static void main(String[] args) { try { String str1, str2; int num1, num2, result; str1 = JOptionPane.showInputDialog("first integer"); str2 = JOptionPane.showInputDialog("second integer"); num1 = Integer.parseInt(str1); num2 = Integer.parseInt(str2); result = divide(num1, num2); JOptionPane.showMessageDialog(null, "The quotient is " + result, "Division", JOptionPane.PLAIN_MESSAGE); } catch (ArithmeticException ex) {

12. } catch (ArithmeticException ex) { JOptionPane.showMessageDialog(null, "Div. by 0 has occured", "ERROR", JOptionPane.ERROR_MESSAGE); System.out.println(“Error has occured"); } } static int divide(int n1, int n2) { int res = n1/n2; return res; } }

14. public class Example4 { public static void main(String[] args) { try { String str1, str2; int num1, num2, result; int arr[] = { 1, 2, 3}; str1 = JOptionPane.showInputDialog( "Enter first integer number"); str2 = JOptionPane.showInputDialog( "Enter first integer number"); num1 = Integer.parseInt(str1); num2 = Integer.parseInt(str2); result = num1 / num2;

15. for(int i=0; i<10; i++) System.out.println(arr[i]); JOptionPane.showMessageDialog(null, "The quotient is " + result, "Division", JOptionPane.PLAIN_MESSAGE); } catch (ArithmeticException ex) { JOptionPane.showMessageDialog(null, "Div. by 0 has occured", "ERROR", JOptionPane.ERROR_MESSAGE); System.out.println("Error has occured"); } catch (IndexOutOfBoundsException ex) { JOptionPane.showMessageDialog(null, "index out of bound", "ERROR", JOptionPane.ERROR_MESSAGE); System.out.println("An error has occured"); } } }