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Answer» Following are the core components of GWT − GWT Java to JavaScript compiler − This is the most important part of GWT which makes it a powerful tool for building RIAs. The GWT compiler is used to translate all the application code written in Java into JavaScript. JRE Emulation library − Google Web Toolkit includes a library that emulates a subset of the Java runtime library. The list includes java.lang, java.lang.annotation, java.math, java.io, java.sql, java.util and java.util.logging. GWT UI building library − This part of GWT consists of many subparts which includes the actual UI components, RPC support, History management, and much more. GWT Hosted Web Browser − GWT Hosted Web Browser lets you run and execute your GWT applications in hosted mode, where your code runs as Java in the Java Virtual Machine without compiling to JavaScript.
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