Programming Articles - Page 2927 of 3363

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.Declaration- The java.lang.StringBuffer.length() method is declared as follows −public int length()Let us see an example program illustrating the use of length() method −Example Live Demopublic class Example {    public static void main(String[] args) {       StringBuffer sb = new StringBuffer("Hello World");       int len = sb.length(); // computes the length of the StringBuffer Object       System.out.println(len);    } }Output11

To create a StringBuffer Object, we use the following syntax −StringBuffer s=new StringBuffer();When we create a reference to an object, we use the assignment operator. For example, String s1 = ”hi”; String s2 = s1; // s2 is a reference of s1A program to illustrate the creation of a StringBuffer object using a reference stored in a variable of type String is given below −Example Live Demopublic class Example {    public static void main(String args[]) {       String input = "hey";       String s1 = input; // creating a reference of the String       ... Read More

The StringBuffer append() method appends the String representation of the particular argument to the sequence. It is a method of the java.lang.StringBuffer class. This method returns a reference to the object.The method changes the value of the object called in the method. Each primitive data type will have a separate method −public StringBuffer append(double d) public StringBuffer append(float f) public StringBuffer append(int i) public StringBuffer append(String str) public StringBuffer append(long l) public StringBuffer append(char[] str) public StringBuffer append(char[] str, int offset, int len) public StringBuffer append(Object obj) public StringBuffer append(boolean b) public StringBuffer append(char c) public StringBuffer append(StringBuffer sb)ExampleA program ... Read More

The StringBuffer append() method appends the String representation of the particular argument to the sequence. It is a method of the java.lang.StringBuffer class. This method returns a reference to the object.The basic syntax for append() method is as follows −public StringBuffer append(data_type variable_name)A program to illustrate the use of append() method is given as follows −Example Live Demoimport java.lang.*; public class Example {    public static void main(String[] args) {       StringBuffer s1 = new StringBuffer("The sun rises in the east ");       System.out.println("Statement : " + s1);       s1.append(true);       System.out.println("Outcome : ... Read More

The capacity() method returns the current capacity. It is a part of the StringBuffer. It is the quantity of storage present for recently inserted characters, after which an allocation occurs.Declaration - The capacity() method is declared in the java.lang.StringBuffer class as follows −public int capacity()The capacity of a StringBuffer object can be set by inserting the value to be set while instantiating the StringBuffer class.Let us see an example program showing how the capacity value can be set.Example Live Demoimport java.lang.*; public class Example {    public static void main(String[] args) {       StringBuffer b = new StringBuffer(100);   ... Read More

The insert() method of the StringBuffer class inserts the String starting from an index specified in the parameter along with the stringThe syntax of the insert method is −original_string.insert( index , var)where var is the variable to be inserted and index is the position where the variable var is to be inserted.Let us see an example program −Example Live Demopublic class Example {    public static void main(String[] args) {       StringBuffer str = new StringBuffer("Hello World");       String a = "Wonderful ";       str.insert(6, a);       System.out.println(str);    } }OutputHello Wonderful World

Streams in Java have a few terminal operations. They are as follows −collect − The collect method returns the outcome of the intermediate operationsList id = Arrays.asList(“Classes", "Methods", "Members"); List output = id.stream().filter(s -> s.startsWith("M")).collect(Collectors.toList());reduce − The reduce method is reduces the elements of a stream into a single element having a certain value after computation. The BinaryOperator is an argument of the reduce method.List list1 = Arrays.asList(11, 33, 44, 21); int even = list1.stream().filter(x -> x % == 0).reduce(0, (ans, i) -> ans+i);forEach − This method iterates through every element in the streamList list1= Arrays.asList(1, 3, 5, 7); List ... Read More

In Java, stream was introduced in Java 8. It represents a collection of elements and supports functional operations on those collections. Here, we are talking about collections like Array, List and Set. The Stream API simply channelizes the elements of sources through various built-in methods to return the desired result. In this article, we are going to discuss different operations that can be performed on the Java stream. Operations on Java 8 Streams There are two types of operations, we can perform on the Java streams − Intermediate Operations − They process the elements of an input stream ... Read More

No, we cannot override private or static methods in Java.Private methods in Java are not visible to any other class which limits their scope to the class in which they are declared.ExampleLet us see what happens when we try to override a private method − Live Democlass Parent {    private void display() {       System.out.println("Super class");        } } public class Example extends Parent {    void display() // trying to override display() {       System.out.println("Sub class");    }    public static void main(String[] args) {       Parent obj = new Example(); ... Read More

If a method is declared as static, it is a member of a class rather than belonging to the object of the class. It can be called without creating an object of the class. A static method also has the power to access static data members of the class.A static variable is a class variable. A single copy of the static variable is created for all instances of the class. It can be directly accessed in a static method.An abstract class in Java is a class that cannot be instantiated. It is mostly used as the base for subclasses to ... Read More