package learnExercise; public class RandomCharacter { public static char getRandomCharacter(char ch1,char ch2){ return (char)(ch1+Math.random()*(ch2-ch1+1));//因为random<1.0,所以需要+1,才能取到ch2 } public static char getRandomLowerCaseLetter(){ return getRandomCharacter(‘a‘,‘z‘); } public static char getRandomUpperCaseLetter(){ return getRandomCharacter(‘A‘,‘Z‘); } public static char getRandomDigitLetter(){ return getRandomCharacter(‘0‘,‘9‘); } public static char getRandomCharacter(){ return getRandomCharacter(‘\u0000‘,‘\uFFFF‘); } }
上面记录的是生成不同区间随机字符的方法。
时间: 2024-09-30 11:07:58