Page 245 - computer science (868) class 11
P. 245

Output:
                 I am  going to play



                        Note:  There are two spaces between “am going” as only the word “not” is removed.


                 The setLength() Method
                 We use the setLength() method to set the length of the String Buffer variable. This also truncates the extra characters
                 if a string of more characters is entered. The syntax of the method is:
                    StringBuffer string_object.setLength(Number of characters);
                 Let us see the below example:
                    StringBuffer s1= new StringBuffer("I am not going to play");
                    s1.setLength(10);
                    System.out.println(s1);
                 Output:
                 I am not g

                 Since 10 characters can accommodate, the stringbuffer object will contain “I am not g” and the rest will truncate.

                 The reverse() Method
                 We use the reverse() method to reverse the characters in the given string. The syntax of the method is:
                    StringBuffer_object.reverse();
                 Let us see the below example:
                    StringBuffer st= new StringBuffer("Computer");
                    st.reverse();
                    System.out.println(st);
                 Output:
                 retupmoC

                 Let us see the below example:
                    StringBuffer st=new StringBuffer("Madam");
                    st.reverse();
                    System.out.println(st);
                 Output:

                 madaM

                     9.4 STRING METHODS UNDER WRAPPER CLASS
                 Wrapper class provides the mechanism to use the primitive data types such as byte, short, int, long, char and Boolean
                 as objects.

                 The valueOf(String str) Method
                 This method is used to convert the string str to its primitive data types using the wrapper class. The syntax is:
                    <primitive type> <variable>= <Wrapper class>.valueOf(String str);
                 Let us see the below example:
                    String str1= "2022";
                    int n=Integer.valueOf(str1);
                    // converts "2022" to 2022.
                    String str2= "20.23";

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