Java Map to String toString(Map attrs)

Description

to String

License

Apache License

Declaration

public static String toString(Map<String, Object> attrs) 

Method Source Code

//package com.java2s;
/*//from  w  w  w  .  j a  v a 2s .  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.
 */

import java.util.ArrayList;
import java.util.Collections;

import java.util.List;
import java.util.Map;

public class Main {
    public static String toString(Map<String, Object> attrs) {
        if (attrs == null) {
            return "NULL";
        }

        StringBuffer buf = new StringBuffer(128);
        List<String> keys = new ArrayList<String>(attrs.keySet());
        Collections.sort(keys);
        buf.append("{");

        for (int i = 0; i < keys.size(); i++) {
            Object name = keys.get(i);
            Object value = attrs.get(name);
            buf.append(name).append("=").append(value).append(",");
        }

        if (buf.length() > 1) {
            buf.delete(buf.length() - 1, buf.length());
        }

        buf.append("}");

        return buf.toString();
    }
}

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