String
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The document discusses Strings in Java. It defines a String as a sequence of characters that is represented as an object of the String class in Java. It describes two ways to create String objects: using string literals with double quotes or the new keyword with a character array. The document provides examples of creating Strings with these methods and describes some common String methods like charAt(), length(), compare(), etc.
![Java String
12/19/20174
In java, string is basically an object that represents
sequence of char values.
An array of characters works same as java string.
For example:
char[] ch={'j','a','v','a','t','p','o','i','n','t'};
String s=new String(ch);](https://image.slidesharecdn.com/string-171219100321/85/String-4-320.jpg)
![String Example
12/19/20177
public class StringExample{
public static void main(String args[]){
String s1="java";//creating string by java string literal
char ch[]={'s','t','r','i','n','g','s'};
String s2=new String(ch);//converting char array to string
String s3=new String("example");//creating java string by
new keyword
System.out.println(s1);
System.out.println(s2);
System.out.println(s3);
}}](https://image.slidesharecdn.com/string-171219100321/85/String-7-320.jpg)
![String methods ex
12/19/20178
public class CharAtExample{
public static void main(String args[]){
String name="javatpoint";
char ch=name.charAt(4);//returns the char value at the 4th index
System.out.println(ch);
}}
public class CharAtExample{
public static void main(String args[]){
String name="javatpoint";
char ch=name.charAt(10);//returns the char value at the 10th
index
System.out.println(ch);
}}](https://image.slidesharecdn.com/string-171219100321/85/String-8-320.jpg)
String
- 1. - Arulkumar V Assistant Professor, SECE Java String
- 2. What is String in java 12/19/20172 Generally, string is a sequence of characters. But in java, string is an object that represents a sequence of characters. The java.lang.String class is used to create string object. How to create String object? There are two ways to create String object: By string literal By new keyword
- 3. 12/19/20173 String Literal Java String literal is created by using double quotes. For Example: String s="welcome";
- 4. Java String 12/19/20174 In java, string is basically an object that represents sequence of char values. An array of characters works same as java string. For example: char[] ch={'j','a','v','a','t','p','o','i','n','t'}; String s=new String(ch);
- 5. The java.lang.String class implements Serializable, Comparable and CharSequence interfaces. 12/19/20175
- 6. String methods 12/19/20176 Java String class provides a lot of methods to perform operations on string such as compare(), concat(), equals(), split(), length(), replace(), compareTo(), intern(), substring() etc.
- 7. String Example 12/19/20177 public class StringExample{ public static void main(String args[]){ String s1="java";//creating string by java string literal char ch[]={'s','t','r','i','n','g','s'}; String s2=new String(ch);//converting char array to string String s3=new String("example");//creating java string by new keyword System.out.println(s1); System.out.println(s2); System.out.println(s3); }}
- 8. String methods ex 12/19/20178 public class CharAtExample{ public static void main(String args[]){ String name="javatpoint"; char ch=name.charAt(4);//returns the char value at the 4th index System.out.println(ch); }} public class CharAtExample{ public static void main(String args[]){ String name="javatpoint"; char ch=name.charAt(10);//returns the char value at the 10th index System.out.println(ch); }}
- 9. 12/19/20179