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Groovy: A powerful, dynamic language for the JVM
There is a newer version: 3.0.21
/*
 *  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 groovy.io;

import java.io.File;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.Writer;
import java.io.FileNotFoundException;
import java.io.UnsupportedEncodingException;

import org.codehaus.groovy.runtime.InvokerHelper;

/**
 * A PrintWriter that outputs objects in Groovy style.
 * That means print(Object) uses InvokerHelper.toString(Object)
 * to produce the same results as Writer.print(Object).
 *
 * @author Jim White
 * @since 1.6
 */
public class GroovyPrintWriter extends PrintWriter 
{
    public GroovyPrintWriter(File file) throws FileNotFoundException
    {
        super(file);
    }

    public GroovyPrintWriter(File file, String csn)
        throws FileNotFoundException, UnsupportedEncodingException
    {
        super(file, csn);
    }

    public GroovyPrintWriter(Writer out) 
    {
        super(out);
    }

    public GroovyPrintWriter(Writer out, boolean autoflush) 
    {
        super(out, autoflush);
    }

    public GroovyPrintWriter(OutputStream out) 
    {
        super(out);
    }

    public GroovyPrintWriter(OutputStream out, boolean autoflush) 
    {
        super(out, autoflush);
    }

    public GroovyPrintWriter(String filename) throws FileNotFoundException 
    {
        super(filename);
    }

    public GroovyPrintWriter(String filename, String csn)
        throws FileNotFoundException, UnsupportedEncodingException 
    {
        super(filename, csn);
    }
        
// Don't need to do this if Groovy is going to print char[] like a string.
//    public void print(char[] x) 
//    {
//        write(InvokerHelper.toString(x));
//    }

    public void print(Object x) 
    {
        write(InvokerHelper.toString(x));
    }

    public void println(Object x) 
    {
        // JDK 1.6 has changed the implementation to do a
        // String.valueOf(x) rather than call print(x).
        // Probably to improve performance by doing the conversion outside the lock.
        // This will do the same thing for us, and we don't have to have access to the lock.
        println(InvokerHelper.toString(x));
    }
}