Determining If a String Is a Legal Java Identifier : 字符 « 数据类型 « Java

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Java 教程
Java » 数据类型 » 字符屏幕截图 
Determining If a String Is a Legal Java Identifier
 

public class Main {
  public static void main(String[] argv) throws Exception {
    boolean b = isJavaIdentifier("my_var"); // true

  }

  public static boolean isJavaIdentifier(String s) {
    if (s.length() == 0 || !Character.isJavaIdentifierStart(s.charAt(0))) {
      return false;
    }
    for (int i = 1; i < s.length(); i++) {
      if (!Character.isJavaIdentifierPart(s.charAt(i))) {
        return false;
      }
    }
    return true;
  }
}

   
  
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