Java List Print printQueryResults(List res)

Description

Convenience method for printing query results.

License

Apache License

Parameter

Parameter	Description
res	Query results.

Declaration

public static void printQueryResults(List<?> res) 

Method Source Code

//package com.java2s;
/*//from   ww w. j av  a  2s  .co 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.List;

public class Main {
    /**
     * Convenience method for printing query results.
     *
     * @param res Query results.
     */
    public static void printQueryResults(List<?> res) {
        if (res == null || res.isEmpty())
            System.out.println("Query result set is empty.");
        else {
            for (Object row : res) {
                if (row instanceof List) {
                    System.out.print("(");

                    List<?> l = (List) row;

                    for (int i = 0; i < l.size(); i++) {
                        Object o = l.get(i);

                        if (o instanceof Double || o instanceof Float)
                            System.out.printf("%.2f", o);
                        else
                            System.out.print(l.get(i));

                        if (i + 1 != l.size())
                            System.out.print(',');
                    }

                    System.out.println(')');
                } else
                    System.out.println("  " + row);
            }
        }
    }
}

Related

1. printMap(HashMap> listHashMap)
2. printNonEmptyList(List list)
3. printObjectList(List