How to remove a specific character (",") in java?

I basically want to remove the last comma "," from my array of 12 integers. My output goes like {23, 45, 54, 56, 67, 87, 89, 90, 76, 89, 87, 23, } whereas I want to remove the last comma and space it creates after the comma.

Sample output:

{23, 45, 54, 56, 67, 87, 89, 90, 76, 89, 87, 23}

My task is to basically sort the integers using bubble sorting method in ascending order. And my output basically shows the sorting at each stage and a final sorted array. I want to remove the last comma and the space it creates from the sorting at each stage, final sorted array, and random generated array. I basically provided comments in my code which will help you find each thing.

Please do not make this overly complicated

Code:

// Create a class and method
class Main {
public static void main(String[] args) {
// Clear screen
System.out.print("\033[H\033[2J");
System.out.flush();
// Initialize a int array with the limit of 12
int[] numbers = new int[12];
// Create a statement 
System.out.println("Random Generated Array:");
System.out.print("{");
// Start a for loop to print random numbers
for (int x = 0; x < numbers.length; x++) {
numbers[x] = (int) (Math.random() * 101); // So that it prints random numbers from 0 to 100 (inclusive)
// Print out the 12 random numbers
System.out.print(numbers[x] + ", ");
}
System.out.print("}");
// Create space
System.out.println();
System.out.println();
// Create a statement 
System.out.println("Sorting At Each Stage:");
// Start looping numbers until 12
for (int i = 0; i < numbers.length; i++) {
// Start looping numbers and comparing it to the "i" values
for (int j = i; j < numbers.length; j++) {
if (numbers[j] < numbers[i]) {
// Swap the positions of the numbers with the variable "temp"
int temp = numbers[j];
numbers[j] = numbers[i];
numbers[i] = temp;
}
// Create space
System.out.println();
// Use a for loop to print numbers at each stage of sorting
System.out.print("{");
for (int k = 0; k < numbers.length; k++) {
System.out.print(numbers[k] + ", ");
}
System.out.print("}");
System.out.println();
}
}
// Create space
System.out.println();
System.out.println("\nBubble Sorted Array:");
System.out.print("{");
// Use a for loop to print the final sorted numbers in ascending order
for (int a = 0; a < numbers.length; a++) {
System.out.print(numbers[a] + ", ");
}
System.out.print("}");
// Create space
System.out.println();
System.out.println();
}
}

You could just use an if condition in your for loop to not place a comma on the last number:

// Start a for loop to print random numbers
for (int x = 0; x < numbers.length; x++) {
numbers[x] = (int) (Math.random() * 101); // So that it prints random numbers from 0 to 100 (inclusive)
if(x + 1 == numbers.length)
//Print out random number with no comma as it's the last
System.out.print(numbers[x]);
else
// Print out the 12 random numbers
System.out.print(numbers[x] + ", ");
}

If you'd like to see an alternate way to join an array into a string you could consider the functionality that came with Java 8 streams.

This streams the array, mapping each element to a string using String::valueOf and then collecting them together with a delimiter of ", ". I simply add a brace to either end to make it match what you were doing.

import java.util.Arrays;
import java.util.stream.Collectors;
public class so64395137 {
public static void main(String[] args) {
int[] numbers = { 23, 45, 54, 56, 67, 87, 89, 90, 76, 89, 87, 23 };
String strNumbers = "{" + Arrays.stream(numbers)
.mapToObj(String::valueOf).collect(Collectors.joining(", "))
+ "}";
System.out.println(strNumbers);
}
}

Prints:

{23, 45, 54, 56, 67, 87, 89, 90, 76, 89, 87, 23}

I've added an if in your loop whereby if it is the last iteration, don't add the extra bits.

    // Create a class and method
class Main {
public static void main(String[] args) {
// Clear screen
System.out.print("\033[H\033[2J");
System.out.flush();
// Initialize a int array with the limit of 12
int[] numbers = new int[12];
// Create a statement 
System.out.println("Random Generated Array:");
System.out.print("{");
// Start a for loop to print random numbers
for (int x = 0; x < numbers.length; x++) {
numbers[x] = (int)(Math.random() * 101); // So that it prints random numbers from 0 to 100 (inclusive)
if (x == numbers.length) {
// Print out the 12 random numbers
System.out.print(numbers[x]);
} else {
System.out.print(numbers[x] + ", ")
}
System.out.print("}");
// Create space
System.out.println();
System.out.println();
// Create a statement 
System.out.println("Sorting At Each Stage:");
// Start looping numbers until 12
for (int i = 0; i < numbers.length; i++) {
// Start looping numbers and comparing it to the "i" values
for (int j = i; j < numbers.length; j++) {
if (numbers[j] < numbers[i]) {
// Swap the positions of the numbers with the variable "temp"
int temp = numbers[j];
numbers[j] = numbers[i];
numbers[i] = temp;
}
// Create space
System.out.println();
// Use a for loop to print numbers at each stage of sorting
System.out.print("{");
for (int k = 0; k < numbers.length; k++) {
System.out.print(numbers[k] + ", ");
}
System.out.print("}");
System.out.println();
}
}
// Create space
System.out.println();
System.out.println("\nBubble Sorted Array:");
System.out.print("{");
// Use a for loop to print the final sorted numbers in ascending order
for (int a = 0; a < numbers.length; a++) {
System.out.print(numbers[a] + ", ");
}
System.out.print("}");
// Create space
System.out.println();
System.out.println();
}
}
System.out.println();
System.out.println();
}
}

If you want an easy way to do it, just create an array to hold a String value of the number. Then use the String.join() method to do the work for you.

int[] numbers = new int[12];
String[] strings = new String[numbers.length];
for (int x = 0; x < numbers.length; x++) {
numbers[x] = (int) (Math.random() * 101); // So that it prints random numbers from 0 to 100 (inclusive)
strings[x] = Integer.toString(numbers[x]);
}
System.out.printf("{%s}%n",
String.join(", ", strings));

Prints something like

{3, 11, 24, 83, 36, 58, 22, 27, 43, 12, 30, 79}
</details>