Exception & input Output

Author: Ashleshk

Input & Output/001_Exception/.idea/misc.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

Input & Output/001_Exception/.idea/modules.xml

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+import java.util.InputMismatchException;
+import java.util.NoSuchElementException;
+import java.util.Scanner;
+
+public class Example {
+
+    public static void main(String[] args) {
+        try {
+            int result = divide();
+            System.out.println(result);
+        } catch(ArithmeticException | NoSuchElementException e) {
+            System.out.println(e.toString());
+            System.out.println("Unable to perform division, autopilot shutting down");
+        }
+    }
+
+    private static int divide() {
+        int x, y;
+//        try {
+        x = getInt();
+        y = getInt();
+        System.out.println("x is " + x + ", y is " + y);
+        return x / y;
+//        } catch(NoSuchElementException e) {
+//            throw new ArithmeticException("no suitable input");
+//        } catch(ArithmeticException e) {
+//            throw new ArithmeticException("attempt to divide by zero");
+//        }
+    }
+
+    private static int getInt() {
+        Scanner s = new Scanner(System.in);
+        System.out.println("Please enter an integer ");
+        while(true) {
+            try {
+                return s.nextInt();
+            } catch(InputMismatchException e) {
+                // go round again.  Read past the end of line in the input first
+                s.nextLine();
+                System.out.println("Please enter a number using only the digits 0 to 9 ");
+            }
+        }
+    }
+}

Input & Output/001_Exception/.idea/workspace.xml

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+import java.util.InputMismatchException;
+import java.util.Scanner;
+
+public class Main {
+
+    public static void main(String[] args) {
+//        int x = 98;
+//        int y = 0;
+//        System.out.println(divideLBYL(x, y));
+//        System.out.println(divideEAFP(x, y));
+//        System.out.println(divide(x, y));
+        int x = getIntEAFP();
+        System.out.println("x is " + x);
+    }
+
+    private static int getInt() {
+        Scanner s = new Scanner(System.in);
+        return s.nextInt();
+    }
+
+    private static int getIntLBYL() {
+        Scanner s = new Scanner(System.in);
+        boolean isValid = true;
+        System.out.println("Please enter an integer ");
+        String input = s.next();
+        for(int i=0; i<input.length(); i++) {
+            if(!Character.isDigit(input.charAt(i))) {
+                isValid = false;
+                break;
+            }
+        }
+        if(isValid) {
+            return Integer.parseInt(input);
+        }
+        return 0;
+    }
+
+    private static int getIntEAFP() {
+        Scanner s = new Scanner(System.in);
+        System.out.println("Please enter an integer ");
+        try {
+            return s.nextInt();
+        } catch(InputMismatchException e) {
+            return 0;
+        }
+    }
+
+    private static int divideLBYL(int x, int y) {
+        if(y != 0) {
+            return x / y;
+        } else {
+            return 0;
+        }
+    }
+
+    private static int divideEAFP(int x, int y) {
+        try {
+            return x / y;
+        } catch(ArithmeticException e) {
+            return 0;
+        }
+    }
+
+    private static int divide(int x, int y) {
+        return x / y;
+    }
+}
+