Which method can be used to set the length of the buffer within a StringBuffer object?
In this example, we will learn to clear the string buffer using the delete() and setLength() method and creating a new StringBuffer object in Java. Show
Example 1: Java program to clear using StringBuffer using delete()
Output StringBuffer: Java is popular. Updated StringBuffer: In the above example, we have used the Here,
the Example 2: Clear the StringBuffer using setLength()
Output StringBuffer: Java is awesome. Updated StringBuffer Here, the Hence, the older character sequence is garbage collected. Note: The Example 3: Clear the StringBuffer by creating a new object
Output StringBuffer: Java is awesome. Updated StringBuffer: Here, Since, every time instead of clearing the previous string buffer, a new string buffer is created. So it is less efficient in terms of performance. StringBuffer is a peer class of String that provides much of the functionality of strings. String represents fixed-length, immutable character sequences while StringBuffer represents growable and writable character sequences. StringBuffer may have characters and substrings inserted in the middle or appended to the end. It will automatically grow to make room for such additions and often has more characters preallocated than are actually needed, to allow room for growth. StringBuffer Constructors StringBuffer( ): It reserves room for 16 characters without reallocation. StringBuffer s=new StringBuffer(); StringBuffer s=new StringBuffer(20); StringBuffer s=new StringBuffer("PrutordotAi"); Some of the most used methods are: length( ) and capacity( ): The length of a StringBuffer can be found by the length( ) method, while the total allocated capacity can be found by the capacity( ) method. import java.io.*; import java.io.*; PrutordotAi insert( ): It is used to insert text at the specified index position. These are a few
of its forms: Code Example: import java.io.*; import java.io.*; import java.io.*; StringBuffer appendCodePoint(int codePoint): This method appends the string representation of the codePoint argument to this
sequence. public int indexOf(String str, public int lastIndexOf(String str, public String substring(int start, java.lang.StringBuffer extends (or inherits from) Object class. StringBuilder: J2SE 5 adds a new string class to Java’s already powerful string handling capabilities. This new class is called StringBuilder. It is identical to StringBuffer except for one important difference: it is not synchronized, which means that it is not thread-safe. The advantage of StringBuilder is faster performance. However, in cases in which you are using multithreading, you must use StringBuffer rather than StringBuilder. How do you measure the length of a StringBuffer?To find the length of the StringBuffer object, the length() function is used. It is a method of the StringBuffer Class. The method returns the count of characters in the sequence.
Which method is used to set the size of the buffer in Java?The limit() method of java. nio. Buffer Class is used to set this buffer's limit. If the position is larger than the new limit then it is set to the new limit.
Which of these method of class StringBuffer is used to find the length?Explanation: length() method is used to obtain length of StringBuffer object, length of “Hello” is 5. 7.
Which of these method of class StringBuffer is used to find the length of current character sequence?length() method returns the length (character count) of the sequence of characters currently represented by this object.
|