Java Formatter Usage getPropertiesString(Properties myProps)

Description

get Properties String

License

Apache License

Declaration

public static String getPropertiesString(Properties myProps) 

Method Source Code

//package com.java2s;
/*//  w  w w . j  av a2s  . c  o  m
 * Copyright 2009 the original author or authors.
 * Copyright 2009 SorcerSoft.org.
 *  
 * 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.
 */

import java.util.Enumeration;
import java.util.Formatter;

import java.util.Properties;

public class Main {
    public static String getPropertiesString(Properties myProps) {

        int maxKeySize = 0;
        int maxValueSize = 0;
        Enumeration<Object> keys = myProps.keys();
        while (keys.hasMoreElements()) {
            String key = (String) keys.nextElement();
            String value = myProps.getProperty(key);
            if (key.length() > maxKeySize)
                maxKeySize = key.length();
            if (value.length() > maxValueSize)
                maxValueSize = value.length();
        }

        StringBuilder sb = new StringBuilder();
        Formatter formatter = new Formatter(sb);
        // String format = "%" + maxKeySize + "s = %" + maxValueSize + "s\n";
        String format = "%-" + maxKeySize + "s = %s\n";
        Enumeration<Object> keys2 = myProps.keys();
        if (!keys2.hasMoreElements())
            sb.append("*** no properties to print ***\n");
        while (keys2.hasMoreElements()) {
            String key = (String) keys2.nextElement();
            String value = myProps.getProperty(key);
            formatter.format(format, key, value);
        }
        return sb.toString();
    }
}

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