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Java Program to locate a character in a string
To locate a character in a string, use the indexOf() method.
Let’s say the following is our string.
String str = "testdemo";
Find a character ‘d’ in a string and get the index.
int index = str.indexOf( 'd');
Example
public class Demo {
public static void main(String []args) {
String str = "testdemo";
System.out.println("String: "+str);
int index = str.indexOf( 'd' );
System.out.printf("'d' is at index %d
", index);
}
}Output
String: testdemo 'd' is at index 4
Let us see another example. The method returns -1, if the character isn’t found −
Example
public class Demo {
public static void main(String []args) {
String str = "testdemo";
System.out.println("String: "+str);
int index = str.indexOf( 'h' );
System.out.printf("'h' is at index %d
", index);
}
}Output
String: testdemo 'h' is at index -1
Updated on: 27-Jun-2020
13K+ Views
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