Bonjour
en compilant mon prg,il sort erreur compilation
Exception in thread "main" java.lang.NullPointerException
at Main.main(Main.java:48)
aidez moi svp
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51 import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.DataInputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; public class Main { @SuppressWarnings("null") public static void main(String[]args) { FileInputStream fis; FileOutputStream fos; BufferedInputStream bis = null; BufferedOutputStream bos; try { fis=new FileInputStream(new File("test.txt")); fos=new FileOutputStream(new File("test2.txt")); bos=new BufferedOutputStream(new FileOutputStream(new File("test3.txt"))); byte[]buf=new byte[8]; long startTime=System.currentTimeMillis(); while(fis.read(buf)!=-1) { fos.write(buf); } System.out.println("Temps de lecture+écriture avec FileInputStream et FileOutputStream:"+(System.currentTimeMillis()-startTime)); startTime=System.currentTimeMillis(); while(bis.read(buf)!=-1) { bos.write(buf); } System.out.println("Temps de lecture+écriture avec BufferedInputStream et BufferedOutputStream:"+(System.currentTimeMillis()-startTime)); fis.close(); bis.close(); } catch(FileNotFoundException e) { e.printStackTrace(); } catch(IOException e) { e.printStackTrace(); } } }
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