In this article, we will discuss how to sort String[] array with example
Arrays class has various sort methods for sorting different primitive data-types and Objects.
1. Sorting String[] array:
- To sort String[] array, we have 2 variant of sort methods from Arrays class
Method Signature:
public static void sort(Object[] a);
public static void sort(Object[] a, int fromIndex, int toIndex);
2. Sorting method for String[] array :
|
Sort method |
Description |
| sort(obj[]); | sorts complete String[] array |
| sort(obj[], sIndex, eIndex); | sorts partial String[] array, as per limits specified in the start-index & end-index |
Let us move forward to discuss both methods for sorting String[] array
2.1 Complete sorting of String[] array
- Here, complete array will be sorted
Method Signature:
public static void sort(obj[] a);
SortingCompleteStringArray.java
package in.bench.resources.java.arrays.sorting;
import java.util.Arrays;
public class SortingCompleteStringArray {
public static void main(String[] args) {
// sample String[] array
String[] strArray = {
"Sachin",
"Dravid",
"Ganguly",
"Laxman",
"Sehwag",
"Kohli",
"Dhoni"
};
// before sorting
System.out.println("Before sorting : \n");
for(String str : strArray) {
System.out.println(str);
}
// sorting full String[] array
Arrays.sort(strArray);
// after sorting
System.out.println("\n\nAfter sorting : \n");
for(String str : strArray) {
System.out.println(str);
}
}
}
Output:
Before sorting :
Sachin
Dravid
Ganguly
Laxman
Sehwag
Kohli
Dhoni
After sorting :
Dhoni
Dravid
Ganguly
Kohli
Laxman
Sachin
Sehwag
2.2 Partial sorting of String[] array
- This is the another variant to sort array
- where we can specify start & end limits within String[] array
Method Signature:
public static void sort(obj[] a, int fromIndex, int toIndex);
SortingPartialStringArray.java
package in.bench.resources.java.arrays.sorting;
import java.util.Arrays;
public class SortingPartialStringArray {
public static void main(String[] args) {
// sample String[] array
String[] strArray = {
"Sachin",
"Dravid",
"Ganguly",
"Laxman",
"Sehwag",
"Kohli",
"Dhoni"
};
// before sorting
System.out.println("Before sorting : \n");
for(String str : strArray) {
System.out.println(str);
}
// sorting partial String[] array
Arrays.sort(strArray, 1, 6);
// after sorting
System.out.println("\n\nAfter sorting : \n");
for(String str : strArray) {
System.out.println(str);
}
}
}
Output:
Before sorting :
Sachin
Dravid
Ganguly
Laxman
Sehwag
Kohli
Dhoni
After sorting :
Sachin
Dravid
Ganguly
Kohli
Laxman
Sehwag
Dhoni
Explanation:
- Here, there are 7 String elements in String[] array
- But, we have sorted String[] array starting from index-1 till index-5 leaving 1st & last element
- Therefore, 1st and last element remains as it is after sorting and only middle elements are sorted
Hope, you found this article very helpful. If you have any suggestion or want to contribute any other way or tricky situation you faced during Interview hours, then share with us. We will include that code here.
Related Articles:
- Byte Arrays sorting
- char Arrays sorting
- short Arrays sorting
- Integer Arrays sorting
- Float Arrays sorting
- Double Arrays sorting
- Long Arrays sorting
- String Arrays sorting
- Java – How to Sort Arrays in Ascending and Descending order ?
- Java – String Arrays sorting in ascending & descending order
- Java – Sorting after merging two String[] Arrays
- Java – Sorting Arrays using Comparable and Comparator interface
References:
- https://docs.oracle.com/javase/7/docs/api/java/util/Arrays.html
- https://docs.oracle.com/javase/tutorial/java/data/strings.html
- https://docs.oracle.com/javase/6/docs/api/java/lang/String.html
- https://docs.oracle.com/javase/7/docs/api/java/lang/String.html
- https://docs.oracle.com/javase/8/docs/api/java/lang/String.html
- https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html
Happy Coding !!
Happy Learning !!
