java bufferedreader读取元素等于另一个数组元素答案

【问题标题】：java bufferreader read elements equal to another array elementsjava bufferedreader读取元素等于另一个数组元素
【发布时间】：2014-04-07 20:46:02
【问题描述】：

我使用 bufferreader 读取了一个文件，并且还有另一个数组（array_to_compare_with）。所以，我想比较这两个数据。
我怎样才能克服这个？有人有线索吗？

String[] array_to_compare_with = { "str1","str2","str3","str4" }

FileInputStream fstream = new FileInputStream("filename");

DataInputStream in = new DataInputStream(fstream);
BufferedReader br = new BufferedReader(new InputStreamReader(in));
String strLine;

while ((strLine = br.readLine()) != null)   {
// strLine and array_to_compare_with comparison needed to be done
}

【问题讨论】：

比较是什么意思？你想检查它是否在数组中？
我的意思是如果 strLine 有 "str1" 元素。如果它有超过 str1 元素将被打印。

标签： java arrays compare filestream readline

【解决方案1】：

也许你想要这样的东西：

    String[] array_to_compare_with = { "str1","str2","str3","str4" };

    FileInputStream fstream = new FileInputStream("filename");

    DataInputStream in = new DataInputStream(fstream);
    BufferedReader br = new BufferedReader(new InputStreamReader(in));
    String strLine;

    while ((strLine = br.readLine()) != null)   {
        boolean found = false;
        for(String str : array_to_compare_with){
            if(str.equalsIgnoreCase(strLine.trim())){
                found = true;
                break;
            }
        }
        if(found){
            //DO WHAT YOU WHANT
        }
    }

【讨论】：

【解决方案2】：

String[] array_to_compare_with = { "str1","str2","str3","str4" }

FileInputStream fstream = new FileInputStream("filename");

DataInputStream in = new DataInputStream(fstream);
BufferedReader br = new BufferedReader(new InputStreamReader(in));
String strLine;

while ((strLine = br.readLine()) != null)   {
    for(String s: array_to_compare_with){
        if(strLine.contains(s)){
            System.out.println(strLine);
            break;
        }
    }
}

【讨论】：