Generate random characters

Author: sharaf-qeshta

Chapter_06/Problem$38/Problem$38.java

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+package chapter_six;
+
+/**
+ * *6.38 (Generate random characters) Use the methods in RandomCharacter in Listing
+ * 6.10 to print 200 uppercase letters and then 200 single digits, printing ten per line.
+ *
+ * @author Sharaf Qeshta
+ * */
+
+
+public class Problem$38
+{
+    public static void main(String[] args)
+    {
+        for (int i = 0; i < 400; i++)
+        {
+            if (i % 10 == 0)
+                System.out.println();
+
+            if (i > 199)
+                System.out.print(getRandomDigitCharacter());
+            else
+                System.out.print(getRandomUpperCaseLetter());
+        }
+    }
+
+    public static char getRandomCharacter(char ch1, char ch2)
+    {
+        return (char) (ch1 + Math.random() * (ch2 - ch1 + 1));
+    }
+
+    public static char getRandomLowerCaseLetter()
+    {
+        return getRandomCharacter('a', 'z');
+    }
+
+
+    public static char getRandomUpperCaseLetter()
+    {
+        return getRandomCharacter('A', 'Z');
+    }
+
+    public static char getRandomDigitCharacter()
+    {
+        return getRandomCharacter('0', '9');
+    }
+
+    public static char getRandomCharacter()
+    {
+        return getRandomCharacter('\u0000', '\uFFFF');
+    }
+
+}