Here we are explaining how to write a java program to sort the strings in alphabetical order. So first we have to read the number of strings the user wants to sort into a variable. Then we have to read the strings into an array. By using a for loop we can compare the strings and place it into the proper positions.
We can compare the strings in java by using the method compareTo()
. An example of compareTo()
is shown below.
StringA.compareTo(StringB)
where StringA and StringB are strings.
The function compareTo()
return a value zero if both the strings are equal. If StringA is greater than the StringB then the function returns a positive value.
If StringA is less than the StringB, then the function returns a negative value.
First, we have to declare the class Sortstr with a public modifier. Then open the main() function. Then read the number of strings the user wants to enter into the variable n. Read the strings into the array str[i] using a for a loop.Then by using nested for loop ,compare str[i] with str[j].If str[i] is greater than str[j] then change the position. After that display the elements in the array str[] using for loop.
STEP 1: Declare the class Sortstr with a public modifier.
STEP 2: Open the main() to start the program, Java program execution starts with the main()
STEP 3: Declare the variable n as integer,t as a string.
STEP 4: Read the number of strings into the variable n.
STEP 5: Declare the string array str[] of size n.
STEP 6: By using a for loop
with the condition i
STEP 7: By using another for loop
with the condition j
STEP 8: compare the string str[i] with str[j].If true then interchange str[i] with str[j].
STEP 9: Increment j by one do step 7.
STEP 10: Display the sorted string as the elements in str[i] using for loop.
import java.util.Scanner;
public class SortStr
{
public static void main(String[] args)
{
int n;
String t;
Scanner sc = new Scanner(System.in);
System.out.print("Enter number of strings:");
n= sc.nextInt();
String str[] = new String[n];
Scanner sc1 = new Scanner(System.in);
System.out.println("Enter the Strings :");
for(int i = 0; i < n; i++)
{
str[i] = sc1.nextLine();
}
sc.close();
sc1.close();
//sort the strings
for (int i = 0; i < n; i++)
{
for (int j = i + 1; j < n; j++) {
if (str[i].compareTo(str[j])>0)
{
t = str[i];
str[i] = str[j];
str[j] = t;
}
}
}
System.out.print("Sorted strings:");
for (int i = 0; i <= n- 1; i++)
{
System.out.println(str[i]);
}
}
}
Enter number of strings:4 Enter the Strings : Zayan Abi Biju Rini Sorted Strings: Abi Biju Rini Zayan