java - 将子字符串作为键并将以下子字符串作为值放入 TreeMap

Question

示例:

String wholeString = 
"Typical models for star formation assume that every type of galaxy produces stars"

我想将分割的字符串及其后面的 (+1) 字符串存储在树形图中:windowSize = 4(预定义):Typi,ypic -> 放入 TreeMapypic,pica -> 放入TreeMap

对于windowSize = 2，它看起来像这样:Ty,yp -> TreeMap

等等。

到目前为止我的代码:

    Map<String, String> generateMap = new TreeMap<String, String>();

    for (int i = 0; i < wholeString.length(); i++) {
        generateMap
                .put((wholeString.substring((i),
                        Math.min((i + windowSize), wholeString.length()))),
                        (wholeString.substring(
                                (i + 1),
                                (Math.min((i + windowSize),
                                        wholeString.length())))));

    }

如果我用 sysprint 打印它，我会得到:{Augen=Augen、Außen=Außen、Innen=Innen、Jauch=Jauch，等等

Answer 1

我的看法:

final String wholeString =
  "Typical models for star formation assume that every type of galaxy produces stars";
final int windowSize = 4;
final Map<String, String> generateMap = new LinkedHashMap<String, String>();

final int limit = wholeString.length() - windowSize;
for (int i = 0; i < limit;) generateMap.put(
      wholeString.substring(i, i + windowSize),
      wholeString.substring(++i, i + windowSize));

for (Map.Entry<String, String> e : generateMap.entrySet())
  System.out.println(e.getKey() + " -> " + e.getValue());