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Task/Text-processing-2/Java/text-processing-2.java

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+import java.util.*;
+import java.util.regex.*;
+import java.io.*;
+
+public class DataMunging2 {
+
+    public static final Pattern e = Pattern.compile("\\s+");
+
+    public static void main(String[] args) {
+        try {
+            BufferedReader infile = new BufferedReader(new FileReader(args[0]));
+            List<String> duplicates = new ArrayList<String>();
+            Set<String> datestamps = new HashSet<String>(); //for the datestamps
+
+            String eingabe;
+            int all_ok = 0;//all_ok for lines in the given pattern e
+            while ((eingabe = infile.readLine()) != null) {
+                String[] fields = e.split(eingabe); //we tokenize on empty fields
+                if (fields.length != 49) //we expect 49 fields in a record
+                    System.out.println("Format not ok!");
+                if (datestamps.add(fields[0])) { //not duplicated
+                    int howoften = (fields.length - 1) / 2 ; //number of measurement
+                                                             //devices and values
+                    for (int n = 1; Integer.parseInt(fields[2*n]) >= 1; n++) {
+                        if (n == howoften) {
+                            all_ok++ ;
+                            break ;
+                        }
+                    }
+                } else {
+                    duplicates.add(fields[0]); //first field holds datestamp
+                }
+            }
+            infile.close();
+            System.out.println("The following " + duplicates.size() + " datestamps were duplicated:");
+            for (String x : duplicates)
+                System.out.println(x);
+            System.out.println(all_ok + " records were complete and ok!");
+        } catch (IOException e) {
+            System.err.println("Can't open file " + args[0]);
+            System.exit(1);
+        }
+    }
+}