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what is the difference between the StringBuffer vs StringBuilder Vs StringTokenizer on the internal implementation. when to use these . kindly waiting for the answer.
I am also going through the source code.
StringBuffer– introduced in JDK 1.0 – is thread safe (all of its methods aresynchronized), whileStringBuilder– since JDK 1.5 – is not. Thus it is recommended to use the latter under normal circumstances.StringTokenizeris meant for a whole different purpose then the former two: cutting strings into pieces, rather than assembling. As @Henning noted, it is also “retired” since JDK 1.5 – it is recommended to useString.splitinstead.