In Jackson, we can use @JsonView to limit or control fields display for different users.

Date: 2019-08-11 View: 2101

In Java, we can use (str != null && !str.isEmpty()) to make sure the String is not empty or null.

Date: 2019-08-11 View: 1678

Few Java examples to show you how to check if a String is numeric.

Date: 2019-08-11 View: 1723

In this tutorial, we will show you how to parse JSON with JSON.simple

Date: 2019-08-11 View: 2054

In Java, we can use new ArrayList<>(Arrays.asList(array)) to convert an Array into an ArrayList

Date: 2019-08-11 View: 1698

In Java, we can use Double.parseDouble() to convert a String to double

Date: 2019-08-11 View: 2065

Few Java examples to show you how to generate a random alphanumeric String, with a fixed length.

Date: 2019-08-11 View: 1957

A Java example to generate a strong, secure random password containing [a-zA-Z0-9!@#$%&*()_+-=[]?] characters, with a length of 15.

Date: 2019-08-11 View: 1813

FastJson provides easily APIs to convert Java objects to / from JSON

Date: 2019-08-11 View: 2127

In Java, there are many ways to write a String to a File.

Date: 2019-08-11 View: 1940

In Java, we have many ways to convert a File to a String.

Date: 2019-08-11 View: 1816

In Java, -Xms set initial Java heap size, while -Xmx set the maximum Java heap size.

Date: 2019-08-11 View: 2130

Only Streams whose source are an IO channel like Files.lines(Path, Charset) need to be closed.

Date: 2019-08-11 View: 1827

Different operating system has a different new line or line separator string:

Date: 2019-08-11 View: 1897

If Java 8, DateTimeFormatter, else SimpleDateFormat to change the date format in a String.

Date: 2019-08-11 View: 1750