Java Character isLetter() 方法 Java 转义字符 Java Character isDigit() 方法 Java Character isLetter() 方法 public class Test { public static void main(String args[]) { System.out.println(Character.isLetter('c')); System.out.println(Character.isLetter('5')); } } Java 转义字符 Java Character isDigit() 方法
