The String class is provided in the Java library.Provide your own implementation for the following methods (name the newclass MyString1):public MyString1(char[] chars);public char charAt(int index);public int length();public MyString1 substring(int begin, int end);public MyString1 toLowerCase();public boolean equals(MyString1 s);public static MyString1 valueOf(int i);

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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.