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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 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...

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()...

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...

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...

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...

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...

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....

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....

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...

There is an overloaded version of the String.join method that accepts as parameter an Iterable implementation. Since all Collection classes implement the Iterable interface, this method can be used to concatenate all the elements in a Collection. The following...

Java 8 has added a static join method to the String class. This concatenates Strings using a delimiter. Performance wise, it is similar to StringBuffer.append, but it has the added advantage that it automatically adds a delimiter. As before, this...

In addition to String, Java has the java.lang.StringBuffer and java.lang.StringBuilder classes. These can also be used to concatenate Strings. The advantage of these classes is that both these classes are mutable, so using them does not result in...