polish

src/lab15_oop/hevs/utils/Input.java

@@ -0,0 +1,135 @@
+package hevs.utils;
+import java.io.*;
+
+/**
+ * * The Class Input is here to enter data with the keyboard.<br>
+ * The types below are supported by the Input class. <br>
+ * <br>
+ * - String <br>
+ * - Integer (int) <br>
+ * - Double (double) - Boolean (boolean) <br>
+ * - Character (char) <br>
+ * <br>
+ * <br>
+ * 
+ * @author Patrice Rudaz (patrice.rudaz@hevs.ch)
+ * @author Cathy Berthouzoz (cathy.berthouzoz@hevs.ch)
+ * @modified Pierre-Andr<64> Mudry
+ * @version 3.0 - 6-10-2008
+ * @see #readString()
+ * @see #readLong()
+ * @see #readLong()
+ * @see #readDouble()
+ * @see #readBoolean()
+ * @see #readChar()
+ */
+public class Input {
+	/**
+	 * * Reads a valid char value from the console.
+	 * 
+	 * @return The typed char
+	 * @see java.lang.Character
+	 */
+	public static char readChar() {
+		boolean ok = false;
+		int res = -1;
+		while (!ok) {
+			try {
+				BufferedReader stdin = new BufferedReader(
+						new InputStreamReader(System.in));
+				res = stdin.read();
+				ok = Character.isDefined(res);
+			} catch (Exception ex) {
+				System.out.println("This is not a valid character. Try again");
+			}
+		}
+		return (char) res;
+	}
+
+	/**
+	 * * Reads a String from the console.
+	 * 
+	 * @return The typed string
+	 * @see java.lang.String
+	 */
+	public static String readString() {
+		BufferedReader stdin = new BufferedReader(new InputStreamReader(
+				System.in));
+		try {
+			return stdin.readLine();
+		} catch (Exception ex) {
+			return "There is a problem. Try again.";
+		}
+	}
+
+	/**
+	 * * Reads a valid integer value from the console.
+	 * 
+	 * @return The typed value
+	 * @see java.lang.Integer
+	 */
+	public static int readInt() {
+		boolean ok = false;
+		int res = -1;
+		while (!ok) {
+			try {
+				BufferedReader stdin = new BufferedReader(
+						new InputStreamReader(System.in));
+				String s = stdin.readLine();
+				if (s.startsWith("0x") || s.startsWith("0X")) {
+					res = Integer.parseInt(s.substring(2), 16);
+				} else {
+					res = Integer.parseInt(s, 10);
+				}
+				ok = true;
+			} catch (Exception ex) {
+				System.out.println("This is not a valid number. Try again");
+			}
+		}
+		return res;
+	}
+
+	/**
+	 * * Reads a valid double value from the console.
+	 * 
+	 * @return The typed double value
+	 * @see java.lang.Double
+	 */
+	public static double readDouble() {
+		boolean ok = false;
+		double res = -1;
+		while (!ok) {
+			try {
+				BufferedReader stdin = new BufferedReader(
+						new InputStreamReader(System.in));
+				res = Double.parseDouble(stdin.readLine());
+				ok = true;
+			} catch (Exception ex) {
+				System.out.println("This is not a valid number. Try again");
+			}
+		}
+		return res;
+	}
+
+	/**
+	 * * Reads a valid boolean value from the console.
+	 * 
+	 * @return the value true if the typed value is true, false otherwise.
+	 * @see java.lang.Boolean
+	 */
+	public static boolean readBoolean() {
+		boolean ok = false;
+		boolean res = false;
+		while (!ok) {
+			try {
+				BufferedReader stdin = new BufferedReader(
+						new InputStreamReader(System.in));
+				res = Boolean.parseBoolean(stdin.readLine());
+				ok = true;
+			} catch (Exception ex) {
+				System.out.println("This is not a valid boolean. Try again");
+			}
+		}
+		return res;
+	}
+}