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Text-IO

Text-IO is a library for creating Java console applications. It can be used in applications that need to read interactive input from the user.

Features

supports reading values with various data types.
allows masking the input when reading sensitive data.
allows selecting a value from a list.
allows to specify constraints on the input values (format patterns, value ranges, length constraints etc.).
provides different terminal implementations and offers a Service Provider Interface (SPI) for configuring additional text terminals.

By default, Text-IO tries to use text terminals backed by java.io.Console. If no console device is present (which may happen, for example, when running the application in your IDE), a Swing-based terminal is used instead.

Example

TextIO textIO = TextIoFactory.getTextIO();

String user = textIO.newStringInputReader()
        .withDefaultValue("admin")
        .read("Username");

String password = textIO.newStringInputReader()
        .withMinLength(6)
        .withInputMasking(true)
        .read("Password");

int age = textIO.newIntInputReader()
        .withMinVal(13)
        .read("Age");

Month month = textIO.newEnumInputReader(Month.class)
        .read("What month were you born in?");

TextTerminal terminal = textIO.getTextTerminal();
terminal.printf("\nUser %s is %d years old, was born in %s and has the password %s.\n",
        user, age, month, password);

Click on the image below to see the output of the above example in a Swing-based terminal.

You can also use a web-based terminal, which allows you to access your application via a browser, as shown in the image below.

Useful links

Text-IO is available in Maven Central and JCenter.