Test whether the argument is a Java keyword - Java javax.tools

Java examples for javax.tools:JavaCompiler

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Description

Test whether the argument is a Java keyword

Demo Code

/*/* ww w . j  a  v a2 s. c o m*/
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
//package com.java2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        String key = "java2s.com";
        System.out.println(isJavaKeyword(key));
    }

    private static final String javaKeywords[] = { "abstract", "assert",
            "boolean", "break", "byte", "case", "catch", "char", "class",
            "const", "continue", "default", "do", "double", "else", "enum",
            "extends", "final", "finally", "float", "for", "goto", "if",
            "implements", "import", "instanceof", "int", "interface",
            "long", "native", "new", "package", "private", "protected",
            "public", "return", "short", "static", "strictfp", "super",
            "switch", "synchronized", "this", "throws", "transient", "try",
            "void", "volatile", "while" };

    /**
     * Test whether the argument is a Java keyword
     */
    private static boolean isJavaKeyword(String key) {
        int i = 0;
        int j = javaKeywords.length;
        while (i < j) {
            int k = (i + j) / 2;
            int result = javaKeywords[k].compareTo(key);
            if (result == 0) {
                return true;
            }
            if (result < 0) {
                i = k + 1;
            } else {
                j = k;
            }
        }
        return false;
    }
}

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