Can you add strings in java

I ran your code and got similar results. Hi, I added the String. Making StringBuffer fastest? Hello Shashank, which version of JDK you are using? StringBuffer is not really a problem in single threaded environment because uncontented lock acquisition has become faster with latest JVM and JIT version. A few corrections to make the test fair.

Both StringBuilder and StringBuffer need to produce their merged string result by calling toString inside the timing fence. The working String s needs to be reset prior to each test that uses it. Appending an integer to a String is not a good test of the string functions. It is possible a bulk of the time measured will be the conversion of the integer to a string.

This conversion is constant on all the tests. I would recommend appending a constant String value rather then a converted integer. I find StringBuilder surprisingly inefficient with its memory management. It is filling a regrowing array of character array rather then a single pass merging all of the results.

The testing should include the display of a hash code of the function results. Hello giri, it refers to instance variable value in the String class. See the full code from java. String class in Eclipse. Feel free to comment, ask questions if you have any doubt. Pages Home core java spring online courses thread java 8 coding sql books oop interview certification free resources best.

We should only use it when thread-safety is required, which is rarely the case. String concatenation is the most common operation in the Java programming language and can easily become a performance nightmare if not done wisely. We should always use StringBuilder to concatenate strings in Java. It outperforms all other methods in terms of performance. It also performs better than StringBuffer because of the overhead caused by the thread-safety of StringBuffer.

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