Erro em compilação de programa

import java.io.*; 
import java.security.*;   
public class DumpKey {   
static public void main(String[] a) {    
 if (a.length<5) { 
      System.out.println("Usage:");
      System.out.println("java DumpKey jks storepass alias keypass out");       
return;  
   }    
 String jksFile = a[0];    
char[] jksPass = a[1].toCharArray();   
 String keyName = a[2];
 char[] keyPass = a[3].toCharArray();
 String outFile = a[4];
 try {      KeyStore jks = KeyStore.getInstance("jks");
 jks.load(new FileInputStream(jksFile), jksPass);
      Key key = jks.getKey(keyName, keyPass);
      System.out.println("Key algorithm: "+key.getAlgorithm());
      System.out.println("Key format: "+key.getFormat());
      System.out.println("Writing key in binary form to "+outFile);
      FileOutputStream out = new FileOutputStream(outFile);
      out.write(key.getEncoded());
      out.close();
    }
 catch (Exception e) { 
     e.printStackTrace();
      return; 
   }
  }
}