lots of exercises in java... from https://github.com/exercism/java

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Isogram

Determine if a word or phrase is an isogram.

An isogram (also known as a "nonpattern word") is a word or phrase without a repeating letter.

Examples of isograms:

lumberjacks
background
downstream

The word isograms, however, is not an isogram, because the s repeats.

If you find that testWorksWithGermanLetters fails even though you think you've implemented it correctly, this could be because of the JVM encoding. Try setting the JAVA_TOOL_OPTIONS environment variable to -Dfile.encoding=UTF8 to fix this.

To set an environment variable on Windows:
1. Go to Computer -> Properties -> Advanced System Settings
2. Add a new environment variable
To set an environment variable on a mac
To set an environment variable on linux

To run the tests:

$ gradle test

For more detailed info about the Java track see the help page.

Source

Wikipedia https://en.wikipedia.org/wiki/Isogram

Submitting Incomplete Solutions

It's possible to submit an incomplete solution so you can see how others have completed the exercise.

README.md

Isogram

Source

Submitting Incomplete Solutions