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  1. import java.io.File;
  2.  import java.io.FileInputStream;
  3.  import java.io.IOException;
  4.  import java.io.InputStream;
  5.  import java.util.zip.CRC32;
  6.  import java.util.zip.CheckedInputStream;
  7.  import java.util.zip.Checksum;
  8.  
  9.  
  10.  
  11. public class ChecksumChecker {
  12.  
  13.     public static long getFileChecksum(String path) throws IOException {
  14.  return getFileChecksum(new File(path));
  15.  }
  16.  
  17.     public static long getFileChecksum(File file) throws IOException {
  18.  return getFileChecksum(new FileInputStream(file));
  19.  }
  20.  
  21.     public static long getFileChecksum(InputStream is) throws IOException {
  22.  // Compute CRC-32 checksum
  23.  CheckedInputStream cis = new CheckedInputStream(is, new CRC32());
  24.  byte[] tempBuf = new byte[1024];
  25.  while (cis.read(tempBuf) >= 0) {
  26.  }
  27.  long csValue = cis.getChecksum().getValue();
  28.  
  29.         return csValue;
  30.  }
  31.  
  32.     public static long getByteArrayChecksum(byte[] byteArray) {
  33.  // Compute CRC-32 checksum
  34.  Checksum checksum = new CRC32();
  35.  checksum.update(byteArray, 0, byteArray.length);
  36.  long csValue = checksum.getValue();
  37.  checksum.reset();
  38.  
  39.         return csValue;
  40.  }
  41.  }
  42.  
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
Main.java:11: error: class ChecksumChecker is public, should be declared in a file named ChecksumChecker.java
public class ChecksumChecker {
       ^
1 error
stdout
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Standard output is empty
https://ideone.com/XA254Z
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
public

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