Update java input/output/exceptions

java/week8/exception-output-file/NamesAndAges.txt

@@ -0,0 +1,5 @@
+Lee 18
+Lua 21
+Mary Beth 19
+Stu 33
+-1

java/week8/exception-output-file/NamesAndAgesUpdated.txt

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+Lee 19
+Lua 22
+Mary 0
+Stu 34

java/week8/exception-output-file/main.java

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+import java.io.PrintWriter;
+import java.util.ArrayList;
+import java.util.Scanner;
+import java.io.FileOutputStream;
+import java.io.FileInputStream;
+import java.io.IOException;
+/*
+ * Same as the input one and the string vs int one, but now writting to a file
+ * instead of the screen.
+*/
+
+public class main {
+
+	public static  ArrayList<String> getInput(Scanner scnr){
+
+		String s = "";
+		String name;
+		int age;
+
+		ArrayList<String> results = new ArrayList<String>();
+
+		while(true){
+
+			//Get name or exit
+			s = scnr.next();
+
+			if (s.equals("-1")){
+				System.out.println();
+				break;
+			}
+			else{
+				name = s;
+			}
+
+			//Get age
+
+			try{
+				age = scnr.nextInt() +1;
+			}
+			catch(Exception e){
+				System.out.println("Age must be an Integer\n" +
+						           "Setting age to 0 ");
+				age = 0;
+
+			}
+			//Finish line
+			scnr.nextLine();
+
+			//Add name plus new age to arr
+			results.add(name + " " + Integer.toString(age));
+
+			System.out.println();
+		}
+		return results;
+	}
+
+	public static void main(String[] args) throws IOException {
+		FileInputStream fileByteStream = null; // File input stream
+		Scanner inFS = null;  				   // Scanner object
+
+		ArrayList<String> userInputs = new ArrayList<String>();
+
+		//Get input
+		System.out.println("Opening file NamesAndAges.txt.");
+		fileByteStream = new FileInputStream("NamesAndAges.txt");
+		inFS = new Scanner(fileByteStream);
+
+		System.out.println("Reading in file and processing");
+
+		userInputs = getInput(inFS);
+
+
+		System.out.println("Closing scanner and writing out results " +
+				           "To NamesAndAgesUpdated.txt");
+		fileByteStream.close();
+		inFS.close();
+
+		//Write to file
+
+		FileOutputStream fileStream = null;
+		PrintWriter outFS = null;
+
+		fileStream = new FileOutputStream("NamesAndAgesUpdated.txt");
+		outFS = new PrintWriter(fileStream);
+
+		for (String S:userInputs){
+			outFS.println(S);
+		}
+		outFS.flush();
+		fileStream.close();
+		outFS.close();
+	}
+}
+