Example usage for java.io FileReader FileReader

Introduction

In this page you can find the example usage for java.io FileReader FileReader.

Prototype

public FileReader(FileDescriptor fd)

Source Link

Document

Creates a new FileReader , given the FileDescriptor to read, using the platform's java.nio.charset.Charset#defaultCharset() default charset .

Usage

From source file:Main.java

public static String readTextContent(String filePath) {
    BufferedReader reader = null;
    try {//from  w  ww  .  ja  v a  2 s. c o m
        reader = new BufferedReader(new FileReader(filePath));
        StringBuilder sb = new StringBuilder();
        while (reader.ready())
            sb.append(reader.readLine());
        return sb.toString();
    } catch (FileNotFoundException e) {
        //            e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        if (reader != null) {
            try {
                reader.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    return null;
}

From source file:Main.java

public static Object getValue(String filepath, String key) {
    try {//from  ww  w . java 2 s .  c  o  m
        ScriptEngineManager sem = new ScriptEngineManager();
        ScriptEngine jsEngine = sem.getEngineByName("js");
        jsEngine.eval(new FileReader(filepath));
        return jsEngine.get(key);
    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return null;
}

From source file:Main.java

public static String[] getMounts(final String path) {
    try {/*from  ww w  . j av  a 2  s . com*/
        BufferedReader br = new BufferedReader(new FileReader("/proc/mounts"), 256);
        String line = null;
        while ((line = br.readLine()) != null) {
            if (line.contains(path)) {
                return line.split(" ");
            }
        }
        br.close();
    } catch (FileNotFoundException e) {
        Log.d(TAG, "/proc/mounts does not exist");
    } catch (IOException e) {
        Log.d(TAG, "Error reading /proc/mounts");
    }
    return null;
}

From source file:SumFile.java

static void sumfile(String filename) throws IOException {
    Reader r = new BufferedReader(new FileReader(filename));
    StreamTokenizer stok = new StreamTokenizer(r);
    stok.parseNumbers();/*from  w  w  w  . j  ava 2  s.  co  m*/
    double sum = 0;
    stok.nextToken();
    while (stok.ttype != StreamTokenizer.TT_EOF) {
        if (stok.ttype == StreamTokenizer.TT_NUMBER)
            sum += stok.nval;
        else
            System.out.println("Nonnumber: " + stok.sval);
        stok.nextToken();
    }
    System.out.println("The file sum is " + sum);
}

From source file:Main.java

/**
 *
 * @param filename//from   w w  w  . j a v  a  2s  . c  om
 */
public static String readTimestampFromFile(String filename) {
    File file = new File(filename);
    try {
        if (file.exists()) {
            BufferedReader br = new BufferedReader(new FileReader(file));
            return br.readLine();
        }
    } catch (Exception e) {
        return null;
    }

    return null;
}

From source file:Main.java

public static String[] getMounts(CharSequence path) {
    BufferedReader bufferedReader = null;
    try {//from  w ww. j a va2s .com
        bufferedReader = new BufferedReader(new FileReader("/proc/mounts"), 256);
        String line;
        while ((line = bufferedReader.readLine()) != null) {
            if (line.contains(path)) {
                return line.split(" ");
            }
        }
    } catch (FileNotFoundException ignored) {
        Log.d("TAG", "/proc/mounts does not exist");
    } catch (IOException ignored) {
        Log.d("TAG", "Error reading /proc/mounts");
    } finally {
        if (bufferedReader != null) {
            try {
                bufferedReader.close();
            } catch (IOException ignored) {
                // ignored
            }
        }
    }
    return null;
}

From source file:Main.java

public static String contentFromFixture(String fixtureName) {
    BufferedReader br;//from w  ww  . ja  v  a  2 s  .  c om
    StringBuilder sb = new StringBuilder();
    try {
        br = new BufferedReader(
                new FileReader("/Users/chang/eclipse/workspace/BasicBlock/src/fixtures/" + fixtureName));

        String line = null;
        while ((line = br.readLine()) != null) {
            sb.append(line);
        }
        br.close();
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return sb.toString();
}

From source file:Main.java

public static String readTextFile(String path) {
    String everything = "";
    BufferedReader br = null;/*  w  w  w  .ja  v a2 s.c  om*/
    try {
        br = new BufferedReader(new FileReader(path));
        StringBuilder sb = new StringBuilder();
        String line = br.readLine();

        while (line != null) {
            sb.append(line);
            sb.append('\n');
            line = br.readLine();
        }
        everything = sb.toString();
        br.close();
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
    }
    return everything;
}

From source file:Main.java

public static long getTotalMemoryPreJB() {
    String str1 = "/proc/meminfo";
    String str2;/*from   w ww  . ja  va  2 s  .c  om*/
    String[] arrayOfString;
    long initial_memory = 0;
    try {
        FileReader localFileReader = new FileReader(str1);
        BufferedReader localBufferedReader = new BufferedReader(localFileReader, 8192);
        str2 = localBufferedReader.readLine();//meminfo
        arrayOfString = str2.split("\\s+");
        initial_memory = Integer.valueOf(arrayOfString[1]).intValue() * 1024;
        localBufferedReader.close();
        return initial_memory;
    } catch (IOException e) {
        return -1;
    }
}

From source file:Main.java

/**
 * Read content of file on disk/*  w  w w .java2 s  .  c om*/
 *
 * @param filename The absolute filename
 * @return
 */
static public String readAll(String filename) {
    try {
        FileReader fileReader = new FileReader(filename);
        BufferedReader bufferedReader = new BufferedReader(fileReader);
        StringBuilder stringBuilder = new StringBuilder();

        String currentLine;
        while ((currentLine = bufferedReader.readLine()) != null)
            stringBuilder.append(currentLine + "\n");
        return stringBuilder.toString();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return "";
}