Java tutorial
import java.io.File; import java.io.FileInputStream; import java.io.IOException; public class Main { public static void main(String[] args) { boolean areFilesIdentical = true; File file1 = new File("c:\\file1.txt"); File file2 = new File("c:\\file2.txt"); if (!file1.exists() || !file2.exists()) { System.out.println("One or both files do not exist"); System.out.println(false); } System.out.println("length:" + file1.length()); if (file1.length() != file2.length()) { System.out.println("lengths not equal"); System.out.println(false); } try { FileInputStream fis1 = new FileInputStream(file1); FileInputStream fis2 = new FileInputStream(file2); int i1 = fis1.read(); int i2 = fis2.read(); while (i1 != -1) { if (i1 != i2) { areFilesIdentical = false; break; } i1 = fis1.read(); i2 = fis2.read(); } fis1.close(); fis2.close(); } catch (IOException e) { System.out.println("IO exception"); areFilesIdentical = false; } System.out.println(areFilesIdentical); } }