New Media Technology News
New Media Technology News

Google Announces Contracts for Java

Google has announced Contracts for Java, aimed at saving time debugging Java code.

Contracts for Java is a new open source tool. Preconditions, postconditions, and invariants are added as Java boolean expressions inside annotations. By default these do nothing, but enabled via a JVM argument, they’re checked at runtime.

The interface is now precise and every class that implements it can be checked at runtime.

Contracts are a powerful language feature and can provide great benefit if used correctly.

Contracts for Java is based on Modern Jass by Johannes Rieken. Rather than being a full time project it was conceived and developed in the 20% time of two software engineers and then developed further through an internship.

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