EN
Java - String substring() method example
5 points
Short example:
xxxxxxxxxx1
// index - 0122
String text = "abc";3
4
System.out.println( text.substring(0) ); // abc5
System.out.println( text.substring(1) ); // bc6
System.out.println( text.substring(2) ); // c7
System.out.println( text.substring(3) ); //8
9
System.out.println( text.substring(0, 0) ); //10
System.out.println( text.substring(0, 1) ); // a11
System.out.println( text.substring(0, 2) ); // ab12
System.out.println( text.substring(1, 2) ); // b13
System.out.println( text.substring(1, 3) ); // bc14
System.out.println( text.substring(0, 3) ); // abc15
System.out.println( text.substring(2, 3) ); // c16
System.out.println( text.substring(3, 3) ); //In this post we cover usage of String substring() method with simple code examples.
We use Java String substring() method to get substring of given string based on provided indexes.
String substring with single parameter example.
int beginIndex - begin index is inclusive.
xxxxxxxxxx1
public class Example1 {2
3
public static void main(String[] args) {4
5
// index - 0126
String str = "abc";7
8
System.out.println(str.substring(0)); // abc9
System.out.println(str.substring(1)); // bc10
System.out.println(str.substring(2)); // c11
System.out.println(str.substring(3)); //12
}13
}Output:
xxxxxxxxxx1
abc2
bc3
c4
String substring with 2 parameters example.
int beginIndex - begin index is inclusive
int endIndex - end index is exclusive
xxxxxxxxxx1
public class Example2 {2
3
public static void main(String[] args) {4
5
// index - 0126
String str = "abc";7
8
System.out.println(str.substring(0, 0)); //9
System.out.println(str.substring(0, 1)); // a10
System.out.println(str.substring(0, 2)); // ab11
System.out.println(str.substring(1, 2)); // b12
System.out.println(str.substring(1, 3)); // bc13
System.out.println(str.substring(0, 3)); // abc14
System.out.println(str.substring(2, 3)); // c15
System.out.println(str.substring(3, 3)); //16
}17
}Output:
xxxxxxxxxx1
2
a3
ab4
b5
bc6
abc7
c8
xxxxxxxxxx1
public class Example3 {2
3
public static void main(String[] args) {4
5
// index - 01234567896
String str = "abcdefghij";7
8
System.out.println(str.substring(0, 1)); // a9
System.out.println(str.substring(0, 2)); // ab10
System.out.println(str.substring(1, 2)); // b11
System.out.println(str.substring(1, 3)); // bc12
System.out.println(str.substring(0, 3)); // abc13
System.out.println(str.substring(0, 4)); // abcd14
System.out.println(str.substring(4, 7)); // efg15
System.out.println(str.substring(4, str.length())); // efghij16
System.out.println(str.substring(0, str.length())); // abcdefghij17
18
// System.out.println(str.substring(-1, str.length()));19
// when we use -1 index we will get below exception:20
// StringIndexOutOfBoundsException: String index out of range: -121
}22
}Output:
xxxxxxxxxx1
a2
ab3
b4
bc5
abc6
abcd7
efg8
efghij9
abcdefghij