Slow and poor performance? Where is it came from?
Compared to which language? JavaScript? Python? Ruby? PHP?
Do you have a benchmark?
Java is among fastest languages. For some tasks it is comparable to C++. With much simpler memory management.
Verbose - yes, but it is feature. All your fancy JavaScript oneliners should be well commented to be understood. Java code that follows conventions is self explained.
Writing GUI is not simple in Java, but it is possible. Check Eclipse and Netbeans. Those apps are among most complex GUI applications you ever seen and they written entirely in Java.
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Slow and poor performance? Where is it came from?
Compared to which language? JavaScript? Python? Ruby? PHP?
Do you have a benchmark?
Java is among fastest languages. For some tasks it is comparable to C++. With much simpler memory management.
Verbose - yes, but it is feature. All your fancy JavaScript oneliners should be well commented to be understood. Java code that follows conventions is self explained.
Writing GUI is not simple in Java, but it is possible. Check Eclipse and Netbeans. Those apps are among most complex GUI applications you ever seen and they written entirely in Java.