Download .jar and add jar file as a Module to your Java project:

Download from https://github.com/engage-so/engage-java/releases/tag/v1.0.0

On Intellij IDEA: File -> Project Structure -> Modules -> Dependencies Tab -> Add -> JARs or Directories -> Attach jar

On Netbeans: Project properties -> Libraries -> Compile -> ADD JAR/folder -> Add Jar

create a LasJava object

las = new LasJava("./src/test/java/com/laslibs/sample/example1.las", true);

You can also pass LAS file contents directly to constructor

String lasString = 
      "~VERSION INFORMATION
      "VERS.                          2.0 :   CWLS LOG ASCII STANDARD -VERSION 2.0
      "WRAP.                          NO  :   ONE LINE PER DEPTH STEP
      "~WELL INFORMATION
      "#MNEM.UNIT              DATA                       DESCRIPTION
      "#----- -----            ----------               -------------------------
      "STRT    .M              1670.0000                :START DEPTH.........
// add false to constructor options
      
LasJava myLas = new LasJava(lasString, false);

Use las.getData() to get a 2-dimensional array containing the readings of each log, Or las.getDataStripped() to get the same as above but with all rows containing null values stripped off

LasJava myLas = new LasJava(lasString, false);

String[][] data = las.getData();
System.out.println(Arrays.deepToString(value));

/**
   [[2650.0, 177.825, -999.25, -999.25],
    [2650.5, 182.5, -999.25,-999.25],
    [2651.0,180.162, -999.25, -999.25],
    [2651.5, 177.825, -999.25, -999.25],
    [2652.0, 177.825, -999.25, -999.25] ...]
  */

String[][] dataStripped = las.getDataStripped();
System.out.println(Arrays.deepToString(value));

/**
 [[2657.5, 212.002, 0.16665, 1951.74597],
 [2658.0, 201.44, 0.1966, 1788.50696],
 [2658.5, 204.314, 0.21004, 1723.21204],
 [2659.0, 212.075, 0.22888, 1638.328],
 [2659.5, 243.536, 0.22439, 1657.91699]...]
 */

• Get the log headers

      // ...
      String[] headers = las.getHeader();
      System.out.println(headers);
      // ['DEPTH', 'GR', 'NPHI', 'RHOB']
     // ...

• Get the log headers descriptions

      //...
      String[] headers = las.getHeaderAndDescr();
      System.out.println(headers);
      // {DEPTH: 'DEPTH', GR: 'Gamma Ray', NPHI: 'Neutron Porosity', RHOB: 'Bulk density'}
      // ...

• Get a particular column, say Gamma Ray log

      // ...
      String[] column = las.getColumn('GR');
      System.out.println(column);
      // [-999.25, -999.25, -999.25, -999.25, -999.25, 122.03, 123.14, ...]
      // ...

      // ...
      // get column with null values stripped
      String[] column = las.getColumnStripped('GR');
      System.out.println(column);
      // [61.61, 59.99, 54.02, 50.87, 54.68, 64.39, 77.96, ...]
      // ...

  Note this returns the column, after all the data has been stripped off their null values, which means that valid data in a particular column would be stripped off if there is another column that has a null value

• Get the Well Parameters

  Presents a way of accessing the details of individual well parameters.

  The details include the following:

    1. description - Description/ Full name of the well parameter
    2. units - Its unit measurements
    3. value - Value
  

    // ...
    Map<String, Map<String, String>> well = las.getWellParams()
    String start = well.get("STRT").get("value") // 1670.0
    String stop = well.get("STOP").get("value") // 1669.75
    String null_value = well.get("NULL").get("value") //  -999.25
    // Any other well parameter present in the file, can be gotten with the same syntax above
    // ...

• Get the Curve Parameters

  Presents a way of accessing the details of individual log columns.

  The details include the following:

    1. description - Description/ Full name of the log column
    2. units - Unit of the log column measurements
    3. value - API value of the log column
  

    // ...
    Map<String, Map<String, String>> well = las.getCurveParams()
    String NPHI = curve.get("NPHI").get("description") // 'Neutron Porosity'
    String RHOB = curve.get("RHOB").get("description") // 'Bulk density'
    // This is the same for all log column present in the file
    // ...

• Get the Parameters of the well

  The details include the following:

    1. description - Description/ Full name of the log column
    2. units - Unit of the log column measurements
    3. value - API value of the log column
  

    // ...
    Map<String, Map<String, String>> well = las.getWellParams(); // 'BOTTOM HOLE TEMPERATURE'
    String BHT = param.get("BHT").get("description") // 'BOTTOM HOLE TEMPERATURE'
    String BHTValaue = param.get("BHT").get("value") // 35.5
    String BHTUnits = param.get("BHT").get("units") // 'DEGC'
    // This is the same for all well parameters present in the file
    // ...

• Get the number of rows and columns

      // ...
      int numRows =  las.rowCount() // 4
      int numColumns =  las.columnCount() // 30
      // ...

• Get the version and wrap

      // ...
      double version = las.getVersion() // '2.0'
      boolean wrap = las.getWrap() // true
      // ...

• Get other information

      // ...
      String other = las.other()
      System.out.println(other)
      // Note: The logging tools became stuck at 625 metres causing the data between 625 metres and 615 metres to be invalid.
      // ...

• Export to CSV

      //...
      las.toCsv("mainTest")
      // Written successfully
      //...

  result.csv

  DEPT	RHOB	GR	NPHI
  0.5	-999.25	-999.25	-0.08
  1.0	-999.25	-999.25	-0.08
  1.5	-999.25	-999.25	-0.04
  ...	...	...	...
  1.3	-999.25	-999.25	-0.08

  Or get the version of csv with null values stripped

      // ...
      las.toCsvStripped('clean')
      // Written successfully
      // ...

  clean.csv

  DEPT	RHOB	GR	NPHI
  80.5	2.771	18.6	-6.08
  81.0	2.761	17.4	-6.0
  81.5	2.752	16.4	-5.96
  ...	...	...	...
  80.5	2.762	16.2	-5.06

• Support

  las-java is an MIT-licensed open source project. You can help it grow by becoming a sponsor/supporter.