What are the four integer types supported by java?
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what is a static block?
How do you remove all elements from an arraylist in java?
Is double bigger than float?
Is singleton class thread safe?
How do you achieve singleton?
Does treeset allow null in java?
Explain about class in java?
What is an Exception ?
How many types of JVM's (OR) Name of the JVM's which are used in Tomcat & Weblogic servers ?
What are the methods available in a class?
what is difference between Exception and Error?
Which java ide is used the most?