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Use String Class Carefully

If two Strings are concatenated using “+” operator in a “for” loop, then it creates a new String Object, every time. This causes wastage of memory and increases performance time. 
Also, while instantiating a String Object, constructors should be avoided and instantiation should happen directly. For example:
1//Slower Instantiation
2String bad = new String("Yet another string object");
3      
4//Faster Instantiation
56String good = "Yet another string object";

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