java.lang.Character.isJavaIdentifierStart()方法的使用及代码示例

x33g5p2x  于2022-01-17 转载在 其他  
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本文整理了Java中java.lang.Character.isJavaIdentifierStart()方法的一些代码示例，展示了Character.isJavaIdentifierStart()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Character.isJavaIdentifierStart()方法的具体详情如下：
包路径：java.lang.Character
类名称：Character
方法名：isJavaIdentifierStart

Character.isJavaIdentifierStart介绍

[英]Indicates whether the specified character is a valid first character for a Java identifier.
[中]指示指定的字符是否为Java标识符的有效第一个字符。

代码示例

代码示例来源：origin: spring-projects/spring-framework

private boolean isVariableName(String name) {
  char[] chars = name.toCharArray();
  if (!Character.isJavaIdentifierStart(chars[0])) {
    return false;
  }
  for (int i = 1; i < chars.length; i++) {
    if (!Character.isJavaIdentifierPart(chars[i])) {
      return false;
    }
  }
  return true;
}

代码示例来源：origin: hibernate/hibernate-orm

private static boolean isJavaIdentifier(String token) {
  return Character.isJavaIdentifierStart( token.charAt( 0 ) );
}

代码示例来源：origin: stackoverflow.com

public static void main(String[] args) {
  for (char c‮h = 0; c‮h < Character.MAX_VALUE; c‮h++) {
    if (Character.isJavaIdentifierPart(c‮h) && !Character.isJavaIdentifierStart(c‮h)) {
      System.out.printf("%04x <%s>%n", (int) c‮h, "" + c‮h);
    }
  }
}

代码示例来源：origin: spring-projects/spring-framework

@Nullable
private String maybeExtractVariableName(@Nullable String candidateToken) {
  if (!StringUtils.hasLength(candidateToken)) {
    return null;
  }
  if (Character.isJavaIdentifierStart(candidateToken.charAt(0)) &&
      Character.isLowerCase(candidateToken.charAt(0))) {
    char[] tokenChars = candidateToken.toCharArray();
    for (char tokenChar : tokenChars) {
      if (!Character.isJavaIdentifierPart(tokenChar)) {
        return null;
      }
    }
    return candidateToken;
  }
  else {
    return null;
  }
}

代码示例来源：origin: apache/incubator-dubbo

/**
 * Returns true if s is a legal Java identifier.<p>
 * <a href="http://www.exampledepot.com/egs/java.lang/IsJavaId.html">more info.</a>
 */
public static boolean isJavaIdentifier(String s) {
  if (isEmpty(s) || !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;
}

代码示例来源：origin: apache/incubator-dubbo

/**
 * Returns true if s is a legal Java identifier.<p>
 * <a href="http://www.exampledepot.com/egs/java.lang/IsJavaId.html">more info.</a>
 */
public static boolean isJavaIdentifier(String s) {
  if (isEmpty(s) || !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;
}

代码示例来源：origin: stackoverflow.com

for (int i = Character.MIN_CODE_POINT; i <= Character.MAX_CODE_POINT; i++)
  if (Character.isJavaIdentifierStart(i) && !Character.isAlphabetic(i))
    System.out.print((char) i + " ");
}

代码示例来源：origin: pxb1988/dex2jar

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

代码示例来源：origin: org.easymock/easymock

public static boolean isJavaIdentifier(String mockName) {
  if (mockName.length() == 0 || mockName.indexOf(' ') > -1
      || !Character.isJavaIdentifierStart(mockName.charAt(0))) {
    return false;
  }
  for (char c : mockName.substring(1).toCharArray()) {
    if (!isJavaIdentifierPart(c)) {
      return false;
    }
  }
  return true;
}

代码示例来源：origin: looly/hutool

private static boolean isFunctionName(String tok) {
  char begin = tok.charAt(0);
  boolean isIdentifier = (Character.isJavaIdentifierStart(begin)) || ('"' == begin);
  return (isIdentifier) && (!LOGICAL.contains(tok)) && (!END_CLAUSES.contains(tok)) && (!QUANTIFIERS.contains(tok)) && (!DML.contains(tok)) && (!MISC.contains(tok));
}

代码示例来源：origin: baomidou/mybatis-plus

private static boolean isFunctionName(String tok) {
  if (tok == null || tok.length() == 0) {
    return false;
  }
  final char begin = tok.charAt(0);
  final boolean isIdentifier = Character.isJavaIdentifierStart(begin) || '"' == begin;
  return isIdentifier &&
    !LOGICAL.contains(tok) &&
    !END_CLAUSES.contains(tok) &&
    !QUANTIFIERS.contains(tok) &&
    !DML.contains(tok) &&
    !MISC.contains(tok);
}

代码示例来源：origin: looly/hutool

private static boolean isFunctionName(String tok) {
  char begin = tok.charAt(0);
  boolean isIdentifier = (Character.isJavaIdentifierStart(begin)) || ('"' == begin);
  return (isIdentifier) && (!LOGICAL.contains(tok)) && (!END_CLAUSES.contains(tok)) && (!QUANTIFIERS.contains(tok)) && (!DML.contains(tok)) && (!MISC.contains(tok));
}

代码示例来源：origin: square/javapoet

public static String toJavaIdentifier(String suggestion) {
 StringBuilder result = new StringBuilder();
 for (int i = 0; i < suggestion.length(); ) {
  int codePoint = suggestion.codePointAt(i);
  if (i == 0
    && !Character.isJavaIdentifierStart(codePoint)
    && Character.isJavaIdentifierPart(codePoint)) {
   result.append("_");
  }
  int validCodePoint = Character.isJavaIdentifierPart(codePoint) ? codePoint : '_';
  result.appendCodePoint(validCodePoint);
  i += Character.charCount(codePoint);
 }
 return result.toString();
}

代码示例来源：origin: hibernate/hibernate-orm

private static boolean isFunctionName(String tok) {
  if ( tok == null || tok.length() == 0 ) {
    return false;
  }
  final char begin = tok.charAt( 0 );
  final boolean isIdentifier = Character.isJavaIdentifierStart( begin ) || '"' == begin;
  return isIdentifier &&
      !LOGICAL.contains( tok ) &&
      !END_CLAUSES.contains( tok ) &&
      !QUANTIFIERS.contains( tok ) &&
      !DML.contains( tok ) &&
      !MISC.contains( tok );
}

代码示例来源：origin: redisson/redisson

/**
   * Checks if a Java identifier is valid.
   *
   * @param identifier The identifier to check for validity.
   * @return {@code true} if the given identifier is valid.
   */
  private static boolean isValidIdentifier(String identifier) {
    if (KEYWORDS.contains(identifier) || identifier.length() == 0 || !Character.isJavaIdentifierStart(identifier.charAt(0))) {
      return false;
    } else if (identifier.equals(PackageDescription.PACKAGE_CLASS_NAME)) {
      return true;
    }
    for (int index = 1; index < identifier.length(); index++) {
      if (!Character.isJavaIdentifierPart(identifier.charAt(index))) {
        return false;
      }
    }
    return true;
  }
}

代码示例来源：origin: square/javapoet

private static String extractMemberName(String part) {
 checkArgument(Character.isJavaIdentifierStart(part.charAt(0)), "not an identifier: %s", part);
 for (int i = 1; i <= part.length(); i++) {
  if (!SourceVersion.isIdentifier(part.substring(0, i))) {
   return part.substring(0, i - 1);
  }
 }
 return part;
}

代码示例来源：origin: square/javapoet

private boolean emitStaticImportMember(String canonical, String part) throws IOException {
 String partWithoutLeadingDot = part.substring(1);
 if (partWithoutLeadingDot.isEmpty()) return false;
 char first = partWithoutLeadingDot.charAt(0);
 if (!Character.isJavaIdentifierStart(first)) return false;
 String explicit = canonical + "." + extractMemberName(partWithoutLeadingDot);
 String wildcard = canonical + ".*";
 if (staticImports.contains(explicit) || staticImports.contains(wildcard)) {
  emitAndIndent(partWithoutLeadingDot);
  return true;
 }
 return false;
}

代码示例来源：origin: checkstyle/checkstyle

/**
 * Checks if the given position is start one for HTML tag.
 * @param javadocText text of javadoc comments.
 * @param pos position to check.
 * @return {@code true} some HTML tag starts from given position.
 */
private static boolean isTag(String[] javadocText, Point pos) {
  final int column = pos.getColumnNo() + 1;
  final String text = javadocText[pos.getLineNo()];
  //Character.isJavaIdentifier... may not be a valid HTML
  //identifier but is valid for generics
  return column >= text.length()
      || Character.isJavaIdentifierStart(text.charAt(column))
        || text.charAt(column) == '/';
}

代码示例来源：origin: stanfordnlp/CoreNLP

protected String readJavaIdentifier() {
 readWhiteSpace();
 StringBuilder sb = new StringBuilder();
 char ch = read();
 if (Character.isJavaIdentifierStart(ch) && !isEOF) {
  sb.append(ch);
  ch = read();
  while (Character.isJavaIdentifierPart(ch) && !isEOF) {
   sb.append(ch);
   ch = read();
  }
 }
 unread();
 // log.info("Read text: ["+sb+"]");
 return sb.toString().intern();
}

代码示例来源：origin: alibaba/fastjson

String readName() {
  skipWhitespace();
  if (ch != '\\' && !Character.isJavaIdentifierStart(ch)) {
    throw new JSONPathException("illeal jsonpath syntax. " + path);
  }
  StringBuilder buf = new StringBuilder();
  while (!isEOF()) {
    if (ch == '\\') {
      next();
      buf.append(ch);
      if (isEOF()) {
        return buf.toString();
      }
      next();
      continue;
    }
    boolean identifierFlag = Character.isJavaIdentifierPart(ch);
    if (!identifierFlag) {
      break;
    }
    buf.append(ch);
    next();
  }
  if (isEOF() && Character.isJavaIdentifierPart(ch)) {
    buf.append(ch);
  }
  return buf.toString();
}

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