java - 有什么方法可以在 cmd 窗口中自动换行？

Question

我和我的 friend 写了一个简单的(但真的很长)基于文本的游戏，它在 Windows 命令提示符下运行。问题是，cmd 窗口不像 Microsoft word 中那样包含任何类型的自动换行符，因此导致游戏无法玩。如果我不是很清楚，这是一个关于游戏现在如何玩的例子:

You wake up in a dark room. Wherev
er you look, you can't see anythin
g. You try to move, but you can't;
your hands are tied down by the lo
oks of it.

有什么简单的方法可以解决这个问题吗？这个游戏有 2000 多行，因此我们可能永远无法一个一个地修复句子。

编辑:为了清楚起见，我想实现以下目标:

You wake up in a dark room.
Wherever you look, you can't see
anything. You try to move, but
you can't; your hands are tied
down by the looks of it.

Answer 1

通常，宽度为 72 的行用于使文本易于阅读，因此我建议坚持这一点，而不是试图计算出文本终端的宽度。要实现正确的自动换行，您最好的选择是依赖 Apache WordUtils，它包含 wrap方法。或者(如果您不想为此下载另一个 JAR)，只需将其实现复制到您的项目中:

/*
 * Copyright 2002-2005 The Apache Software Foundation.
 *
 * 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.
 */
public static String wrap(String str, int wrapLength, String newLineStr, boolean wrapLongWords) {
    if (str == null) {
        return null;
    }
    if (newLineStr == null) {
        newLineStr = SystemUtils.LINE_SEPARATOR;
    }
    if (wrapLength < 1) {
        wrapLength = 1;
    }
    int inputLineLength = str.length();
    int offset = 0;
    StringBuilder wrappedLine = new StringBuilder(inputLineLength + 32);

    while ((inputLineLength - offset) > wrapLength) {
        if (str.charAt(offset) == ' ') {
            offset++;
            continue;
        }
        int spaceToWrapAt = str.lastIndexOf(' ', wrapLength + offset);

        if (spaceToWrapAt >= offset) {
            // normal case
            wrappedLine.append(str.substring(offset, spaceToWrapAt));
            wrappedLine.append(newLineStr);
            offset = spaceToWrapAt + 1;

        } else {
            // really long word or URL
            if (wrapLongWords) {
                // wrap really long word one line at a time
                wrappedLine.append(str.substring(offset, wrapLength + offset));
                wrappedLine.append(newLineStr);
                offset += wrapLength;
            } else {
                // do not wrap really long word, just extend beyond limit
                spaceToWrapAt = str.indexOf(' ', wrapLength + offset);
                if (spaceToWrapAt >= 0) {
                    wrappedLine.append(str.substring(offset, spaceToWrapAt));
                    wrappedLine.append(newLineStr);
                    offset = spaceToWrapAt + 1;
                } else {
                    wrappedLine.append(str.substring(offset));
                    offset = inputLineLength;
                }
            }
        }
    }

    // Whatever is left in line is short enough to just pass through
    wrappedLine.append(str.substring(offset));

    return wrappedLine.toString();
}