String in java
In Java, a string is a sequence of characters. It is one of the most widely used data types, and it is extensively used in Java programming. In this post, we will discuss what is a string in Java, how to declare a string in Java, and how to perform different operations on strings.
A string is a sequence of characters in Java. It is an object in Java, and it is implemented as an array of characters. In Java, strings are immutable, which means that once a string object is created, its contents cannot be changed.
In the below PDF we discuss about String in java in detail in simple language, Hope this will help in better understanding.
How to Create a String object in Java :
Java Provide two ways:
- By String literal
- By new Keyword
In the above PDF all ways are discussed in detail in simple language.
A String in Java is a sequence of characters that is represented using the String class. In memory, a String object is represented as an array of characters, where each character corresponds to a Unicode code point.
The == operator compares the memory addresses of two objects, while the equals() method compares the content of two objects. When comparing two String objects in Java, you should use the equals() method to check if the content of the two objects is the same.
To convert a string to all uppercase letters in Java, you can use the toUpperCase() method.
String str = "hello"; String upperStr = str.toUpperCase();