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Eclipse is a popular open-source IDE for Java development. Default Eclipse installation includes Eclipse Rich Client Platform (RCP), Java Development Tools (JDT) and Plugin Development Environment (PDE). All these components are working well with Harmony and a lot of Eclipse Unit Tests (EUT) are regularly executed against Harmony builds, see Eclipse_Unit_Tests_Pass_on_DRLVM. Harmony also reuses implementation of Java compiler and Java Debug Interface (JDI) from Eclipse JDT project.