PART D: OMIT INITIALGiven 2 strings, str1 and str2, print out their concatenation, except omit the first character of each. Assumethe string will be at least length 1.Methods to use: substring(), length()Testing cases: Hello,There => ellohere java,code => avaode shotl,java => hotlava ab,xy => by ab,x => b x,ac => c a,x => (empty string)kit,kat => itat mart,dart => artart

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Methods of StringBuilder class

The StringBuilder class can be used to create mutable strings. The methods defined in the StringBuilder class are widely used to manipulate and concatenate strings. It is a non-synchronized class which has public methods that can be accessed by multiple threads. It is not thread-safe.