Java Gists

The DecimalFormat class offers the following four such methods which can be used to easily set the maximum and/or minimum digits for decimal numbers. As shown in the below table, two of these methods can set max/min digits for integer part while the other two methods can do the...

The DecimalFormat class has a method called setRoundingMode() which can be used for setting the rounding mode for DecimalFormat object. The setRoundingMode() accepts RoundingMode class object as the parameter. You can pass any of the Enum constants available in the RoundingMode class as parameter to the setRoundingMode() method to...

The DecimalFormat class has a method called setGroupingSize() which sets how many digits of the integer part to group. Groups are separated by the grouping separator. Hence you can use setGroupingSize() method to change the default group digits number as you need. The following example demonstrates setting grouping separator for...

As mentioned in earlier posts, the java.text.DecimalFormat class is used to format decimal numbers via predefined patterns specified as String. Apart from the decimal separator, grouping separator, currency separator etc., It is also possible to mix String literals within the pattern. The following example demonstrates embedding String literals within pattern: b8c17d2e8b2af4b43df92c35de7031e8 The above...

You can customize which symbols are used as decimal separator, grouping separator, currency seperator etc. using a DecimalFormatSymbols instance together with java.text.DecimalFormat class. The DecimalFormatSymbols instance can be passed to java.text.DecimalFormat constructor followed by the call to format() method of java.text.DecimalFormat to achieve the desired decimal separator,...

If you want to create a DecimalFormat instance for a specific Locale, create a NumberFormat and cast it to a DecimalFormat. The java.text.DecimalFormat class is used to format numbers using a user specified formatting. This concrete subclass of NumberFormat, allows formatting decimal numbers via predefined patterns specified as String ....

The java.text.DecimalFormat class is used to format numbers using a user specified formatting. This concrete subclass of NumberFormat, allows formatting decimal numbers via predefined patterns specified as String. It has a variety of features designed to make it possible to parse and format numbers in any locale The following example...

The LocalDate class has an overloaded parse() method. In addition to the String Date, it accepts a DateTimeFormatter instance that specifies the format of the input date. So, this can be used in case the String date is not in the yyyy-MM-dd format. The following code demonstrates this: The following code demonstrates...

The LocalDate class has a parse method. You can use this to convert a String to a LocalDate. So, this code simply invokes the parse method with the String date object. It prints the following output: 2015-06-12. The following code demonstrates this: cd2973313a135357d0890b0ba8152680 The LocalDate.parse() method requires the String date to...

The java.util.Calendar class also encapsulates a date. The Calendar class has some more features than the java.util.Date class. It provides the ability to extract the day, month, year, and other fields corresponding to the date that the Calendar represents. So, sometimes, you may need to convert a String date...

Sometimes, you may need to convert a String to a java.util.Date object. For this, you need to use the SimpleDateFormat class. You need to specify the format in which the String date is present and invoke the parse method. The following code demonstrates how this can be done: 9511d34805f97b537363b6106339b495 This code...

Java 8 has added a new class called StringJoiner. This concatenates Strings using a delimiter as well as adds a prefix and suffix to the concatenated String. Performance-wise, it is similar to StringBuffer.append, but it has the added advantage that it automatically adds a delimiter, prefix and suffix. The following...