Question

I have an output in the console from my code like the sample given below,

... columns=20xs, viewport_supported=true, wta=false, ..., mmf=false
... columns=11xs, viewport_supported=false, wta=false, ..., mmf=true 
... columns=15xs, viewport_supported=true, wta=false, ..., mmf=false

I want to re-arrange it by extracting the common string left to the ‘=’ sign and put it as the column header and its values in its column. How to start doing this in Java?

I am looking for the output like below:

columns      viewport_supported        wta     and so on
  20xs              true              false
  11xs              false             false
  15xs              true              false

Answer 1

I finally was able to do it like this: Split the string using split() method, create a Map dynamic array and assign key and value to the string respectively on either side of the ‘equals to sign’. Then printing the header information by parsing the map representing the first data row and then print all the data rows by iterating the objects from the Map. excerpts from my code is given below.

/* delimiter */
            String delimiter = ", ";

// given string will be split by the argument delimiter provided.

            String[] temp = capabilities.split(delimiter);

            /* print substrings */
            Map<String, String> row = new HashMap<String, String>();
            for (int i = 0; i < temp.length; i++) {
                String delimiter1 = "=";
                String[] temp1 = null;
                temp1 = temp[i].split(delimiter1);
                if (temp1 != null && temp1.length == 2) {
                    row.put(temp1[0], temp1[1]);
                }
            }
            dataRows.add(row);
// print the header --- but first, get the header information by parsing the map representing the first data row
        List<String> fieldNames = new ArrayList<String>();
        Map<String, String> firstRow = dataRows.get(0);
        for (String fieldName : firstRow.keySet()) { 
            fieldNames.add(fieldName);
        }
        for (String fieldName : fieldNames) {
                            System.out.print("\t" + fieldName);

        }

        // now, print all data rows
        for (Map<String, String> dataRow : dataRows) { 
            System.out.println("\n");
            for (String fieldName : fieldNames) {
            System.out.print("\t" + dataRow.get(fieldName));}

Thank you all for your help.