A simple Java script to verify you're using Java 17+

Looking at Oracle's for examples of added features.

For example, we can run the following script to test whether Text Blocks is included in the local Java version, which was only introduced in JDK 15+.

// dummy.java

public class dummy {

    public static void main(String[] args) {

        System.out.println("""

            Hello, World!

            Hello2

                """);

    }

}

Running javac dummy.java && java dummy should print out the multiline string if you installed JDK 15 and above, and error out if you have Java 14 and below.

This example can be extended by testing other features that only work with specific versions of Java (true for other languages as well).

References

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