The getAdler() function of the Deflater class in java.util.zip returns the Adler-32 value of the uncompressed data. Adler-32 is a checksum algorithm which is widely used zlib compression library.
Function Signature:
public int getAdler()
Syntax:
d.getAdler();
Parameter: The function requires no parameter
Return Type: The function returns an Integer value which is the Adler-32 value of the uncompressed data.
Exception: The function does not throw any exception
Example 1:
// Java program to describe the use// of finished() function import java.util.zip.*;import java.io.UnsupportedEncodingException; class GFG { public static void main(String args[]) throws UnsupportedEncodingException { // deflater Deflater d = new Deflater(); // get the text String pattern = "Lazyroar", text = ""; // generate the text for (int i = 0; i < 4; i++) text += pattern; // set the input for deflator d.setInput(text.getBytes("UTF-8")); // finish d.finish(); // output bytes byte output[] = new byte[1024]; // compress the data int size = d.deflate(output); // compressed String System.out.println("Compressed String :" + new String(output) + "\n Size " + size); // original String System.out.println("Original String :" + text + "\n Size " + text.length()); // get Adler-32 value System.out.println("Adler-32 value :" + d.getAdler()); // end d.end(); }} |
Output:
Compressed String :x?sOM?.N?/r???q?? Size 21 Original String :LazyroarLazyroarLazyroarLazyroar Size 52 Adler-32 value :511972501
Reference: https://docs.oracle.com/javase/7/docs/api/java/util/zip/Deflater.html#getAdler()