*6.38 (Generate random characters) Use the methods in RandomCharacter in Listing 6.10 to print 100 uppercase letters and then 100 single digits, printing ten per line.
public class ProgrammingExercise6_38 { public static void main(String[] args) { for (int i = 1; i <= 100; i++) { if (i % 10 == 1 && i != 1) { System.out.println(); } System.out.print(getRandomUpperCaseLetter()); } for (int i = 1; i <= 100; i++) { if (i % 10 == 1) { System.out.println(); } System.out.print(getRandomDigitCharacter()); } } /** Generate a random character between ch1 and ch2 */ public static char getRandomCharacter(char ch1, char ch2) { return (char) (ch1 + Math.random() * (ch2 - ch1 + 1)); } /** Generate a random lowercase letter */ public static char getRandomLowerCaseLetter() { return getRandomCharacter('a', 'z'); } /** Generate a random uppercase letter */ public static char getRandomUpperCaseLetter() { return getRandomCharacter('A', 'Z'); } /** Generate a random digit character */ public static char getRandomDigitCharacter() { return getRandomCharacter('0', '9'); } /** Generate a random character */ public static char getRandomCharacter() { return getRandomCharacter('\u0000', '\uFFFF'); } }
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