How can you add and remove nodes in jtree?
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Give a practical example of singleton class usage?
What is the use of hashmap in java?
2) Suppose there are 5 directories having lot of files (say txt files) in each directory. 2 things :- 2.1) You want to search for filenames which have a particular pattern. 2.2) Out of these filtered files you want to search for a particular keyword or a search string. How can you achieve this?
What is the difference between an if statement and a switch statement?
Explain about varargs in java?
What classes of exceptions may be caught by a catch clause in java programming?
What are the four integer types supported by java?
Is 0 an even number?
What are internal and external variables?
How to sort numbers in java without array?
what is the main difference between string and stringbuffer? can you explain it with program?
What is an object?s lock? Give name of object?s that have locks?