@@ -0,0 +1,1312 @@
+/*%0A * Copyright 2020 %22Masahiko Sakamoto%22 %3Csakamoto.gsyc.3s@gmail.com%3E%0A *%0A * Licensed under the Apache License, Version 2.0 (the %22License%22);%0A * you may not use this file except in compliance with the License.%0A * You may obtain a copy of the License at%0A *%0A *     http://www.apache.org/licenses/LICENSE-2.0%0A *%0A * Unless required by applicable law or agreed to in writing, software%0A * distributed under the License is distributed on an %22AS IS%22 BASIS,%0A * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.%0A * See the License for the specific language governing permissions and%0A * limitations under the License.%0A */%0A%0Apackage javasnack.tool;%0A%0Aimport java.io.PrintWriter;%0Aimport java.io.StringWriter;%0A%0Apublic class StringWriterPrinter %7B%0A    private StringWriter sw;%0A    public PrintWriter out;%0A%0A    public StringWriterPrinter() %7B%0A        this.sw = new StringWriter();%0A        this.out = new PrintWriter(this.sw, true); // enable auto flush%0A    %7D%0A%0A    @Override%0A    public String toString() %7B%0A        this.sw.flush();%0A        return this.sw.toString();%0A    %7D%0A%0A    public void clear() %7B%0A        this.sw = new StringWriter();%0A        this.out = new PrintWriter(this.sw, true); // enable auto flush%0A    %7D%0A%0A    public String cat(final String... lines) %7B%0A        return String.join(%22%5Cn%22, lines);%0A    %7D%0A%7D%0A

add StringWriterPrinter mini utility.