Java程序获取随机字母
要生成随机字母，请将字母设置为强，然后使用将toCharArray()其转换为字符数组-
"abcdefghijklmnopqrstuvwxyz".toCharArray()
现在，使用nextInt()从中生成随机字母-
System.out.println("" + "abcdefghijklmnopqrstuvwxyz".toCharArray()[randNum.nextInt("abcdefghijklmnopqrstuvwxyz".toCharArray().length)]);上面，最初我们创建了一个Random对象-
static Random randNum = new Random();
示例
import java.util.Random;
public class Demo {
static Random randNum = new Random();
public static void main(String args[]) {
System.out.println("Lowercase random letters...");
for (int i = 0; i < 5; i++) {
System.out.println("" + "abcdefghijklmnopqrstuvwxyz".toCharArray()[randNum.nextInt("abcdefghijklmnopqrstuvwxyz".toCharArray().length)]);
}
System.out.println("Uppercase random letters...");
for (int i = 0; i < 5; i++) {
System.out.println("" + "ABCDEFGHIJKLMNOPQRSTUVWZYZ".toCharArray()[randNum.nextInt("ABCDEFGHIJKLMNOPQRSTUVWZYZ".toCharArray().length)]);
}
}
}输出结果
Lowercase random letters... d l h j s Uppercase random letters... B K I Z N