Examples of java.io.RandomAccessFile.readInt()

java.io.RandomAccessFile.readInt()
Reads a 32-bit integer value from this stream. @return int the next int value from the source stream. @throws IOException If a problem occurs reading from this DataInputStream. @see DataOutput#writeInt(int)

    // Lock and Read old storage file
    RandomAccessFile oldFile = new RandomAccessFile(oldF, "rws");
    FileLock oldLock = oldFile.getChannel().tryLock();
    try {
      oldFile.seek(0);
      int odlVersion = oldFile.readInt();
      if (odlVersion < LAST_PRE_UPGRADE_LAYOUT_VERSION)
        return false;
    } finally {
      oldLock.release();
      oldFile.close();

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    if (oldLock == null)
      throw new IOException("Cannot lock file: " + oldF);
    String odlStorageID = "";
    try {
      oldFile.seek(0);
      int odlVersion = oldFile.readInt();
      if (odlVersion < LAST_PRE_UPGRADE_LAYOUT_VERSION)
        throw new IncorrectVersionException(odlVersion, "file " + oldF,
                                            LAST_PRE_UPGRADE_LAYOUT_VERSION);
      odlStorageID = org.apache.hadoop.io.UTF8.readString(oldFile);

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    // check the layout version inside the image file
    File oldF = new File(oldImageDir, "fsimage");
    RandomAccessFile oldFile = new RandomAccessFile(oldF, "rws");
    try {
      oldFile.seek(0);
      int odlVersion = oldFile.readInt();
      if (odlVersion < LAST_PRE_UPGRADE_LAYOUT_VERSION)
        return false;
    } finally {
      oldFile.close();
    }

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                    // see http://cvs.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/cmd/ptools/pargs/pargs.c
                    // for how to read this information


                    psinfo.seek(8);
                    if(adjust(psinfo.readInt())!=pid)
                        throw new IOException("psinfo PID mismatch");   // sanity check
                    ppid = adjust(psinfo.readInt());


                    psinfo.seek(188);  // now jump to pr_argc
                    argc = adjust(psinfo.readInt());

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                    // for how to read this information


                    psinfo.seek(8);
                    if(adjust(psinfo.readInt())!=pid)
                        throw new IOException("psinfo PID mismatch");   // sanity check
                    ppid = adjust(psinfo.readInt());


                    psinfo.seek(188);  // now jump to pr_argc
                    argc = adjust(psinfo.readInt());
                    argp = adjust(psinfo.readInt());
                    envp = adjust(psinfo.readInt());

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                    if(adjust(psinfo.readInt())!=pid)
                        throw new IOException("psinfo PID mismatch");   // sanity check
                    ppid = adjust(psinfo.readInt());


                    psinfo.seek(188);  // now jump to pr_argc
                    argc = adjust(psinfo.readInt());
                    argp = adjust(psinfo.readInt());
                    envp = adjust(psinfo.readInt());
                } finally {
                    psinfo.close();
                }

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                        throw new IOException("psinfo PID mismatch");   // sanity check
                    ppid = adjust(psinfo.readInt());


                    psinfo.seek(188);  // now jump to pr_argc
                    argc = adjust(psinfo.readInt());
                    argp = adjust(psinfo.readInt());
                    envp = adjust(psinfo.readInt());
                } finally {
                    psinfo.close();
                }
                if(ppid==-1)

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                    ppid = adjust(psinfo.readInt());


                    psinfo.seek(188);  // now jump to pr_argc
                    argc = adjust(psinfo.readInt());
                    argp = adjust(psinfo.readInt());
                    envp = adjust(psinfo.readInt());
                } finally {
                    psinfo.close();
                }
                if(ppid==-1)
                    throw new IOException("Failed to parse PPID from /proc/"+pid+"/status");

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                        LOGGER.finer("Reading "+getFile("as"));
                    try {
                        for( int n=0; n<argc; n++ ) {
                            // read a pointer to one entry
                            as.seek(to64(argp+n*4));
                            int p = adjust(as.readInt());


                            arguments.add(readLine(as, p, "argv["+ n +"]"));
                        }
                    } finally {
                        as.close();

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                        LOGGER.finer("Reading "+getFile("as"));
                    try {
                        for( int n=0; ; n++ ) {
                            // read a pointer to one entry
                            as.seek(to64(envp+n*4));
                            int p = adjust(as.readInt());
                            if(p==0)
                                break;  // completed the walk


                            // now read the null-terminated string
                            envVars.addLine(readLine(as, p, "env["+ n +"]"));

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