AvailableCharSets.java

package org.javacore.nio;

import java.nio.charset.Charset;
import java.util.Iterator;
import java.util.SortedMap;

/*
 * Copyright [2015] [Jeff Lee]
 *
 * Licensed 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.
 */

/**
 * @author Jeff Lee
 * @since 2015-10-11 19:51:10
 *  可用的CharSet打印
 */
public class AvailableCharSets {
    public static void main(String[] args) {
        // charset对象的有序映射
        SortedMap<String,Charset> charSets =
                Charset.availableCharsets();
        // 获取key的迭代器
        Iterator<String> iterator = charSets.keySet().iterator();
        while (iterator.hasNext()) {
            String csName = iterator.next();
            System.out.print(csName);
            // 获取别名的Charset集合的迭代器
            Iterator aliases =
                    charSets.get(csName).aliases().iterator();
            if (aliases.hasNext())
                System.out.print("： ");
            while (aliases.hasNext()) {
                System.out.print(aliases.next());
                if (aliases.hasNext())
                    System.out.print(",");
            }
            System.out.println();
        }
    }
}