[英]Reading multiple files using Java
I have a project where I have to print frequently used words across multiple files where each word must appear at least once in each file. 我有一个项目,我必须在多个文件中打印常用单词,每个单词在每个文件中必须至少出现一次。 .
。 now am done with printing the words but am stuck with how to check the next part of the condition that is highlighted in bold.
现在已经完成了打印单词的操作,但是仍然受困于如何检查以粗体突出显示的条件的下一部分。
condition is :: "where each word must appear at least once in each file" my output is something like this 条件是:: “每个单词在每个文件中必须至少出现一次”,我的输出是这样的
...
...
Word : 3 andrew 790
Word : 4 natasha 725
Word : 5 little 651
...
...
a snippet: 一段代码:
..... ..... ..... .....
Scanner fileReader = null;
Map<String, Words> map = new java.util.HashMap<String, Words>();
System.out.println(" file read");
// as command line arguments
for (i = 0; i < fileNames.length; i++) {
System.out.println("hi");
fileReader = new Scanner(new FileInputStream(fileNames[i]));
while (fileReader.hasNextLine()) { // while1 starts
String line = fileReader.nextLine();
String word = null;
..... ..... ..... .....
Guide me to proceed as iam a novice programmer Thanks in advance 指导我以iam新手程序员的身份继续前进
Maintain a Map<String,Integer> word2count
for each file. 为每个文件维护一个
Map<String,Integer> word2count
。
After the second file, compute the intersection of the key sets of the maps for file 1 and file 2. Using the intersection, create a map containing the words from the intersection and the sum of the counts from maps 1 and map 2. Let this be the map for "file 1". 在第二个文件之后,计算文件1和文件2的映射键集的交集。使用交集,创建一个映射,其中包含来自交集的单词以及来自映射1和映射2的计数总和。是“文件1”的映射。
Continue likewise with the map for "file 1" and the map for file 3, and all following files. 同样,继续“文件1”的映射和文件3的映射,以及所有后续文件。
If the intersection is empty after some file, stop: the resulting word list is empty. 如果某个文件后的交点为空,请停止:结果单词列表为空。
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