1-Error: Could not find or load main class BasicSorting_1 2-Caused by: java.lang.NoClassDefFoundError: 3- Sorting/BasicSorting_1 (wrong name: BasicSorting_1)// enter image description here

package Sorting;

import java.util.*;

public class BasicSorting_1 {
    public static void bubbleSort(int num[]) {
        int n = num.length;
        for (int turn = 0; turn < n - 1; turn  ) {
            for (int j = 0; j < n - 1; j  ) {
                if (num[j] > num[j   1]) {
                    // swap
                    int temp = num[j];
                    num[j] = num[j   1];
                    num[j   1] = temp;
                }
            }
        }
    }

    public static void display(int num[]) {
        int n = num.length;
        for (int i = 0; i < n; i  ) {
            System.out.print(num[i]   " ");
        }
        System.out.println();
    }

    public static void main(String[] args) {
        int num[] = { 2, 3, 1, 7, 5 };
        bubbleSort(num);
        display(num);
    }
}

CodePudding user response：

It is easy. Look at the error when calling the java.uti library. I suspect it's due to the ide you're using. Try another ide, such as Eclipse, NetBeans, etc. or check the library is it there?!

CodePudding user response：

Maybe, you are running the 'project' instead of just the class BasicSorting_1. Then this error may apear because you have the "main method" in both classes (BasicSorting and BasicSorting_1), then Java can't determine wich class he will use as 'main'.

Try running just the single java file;

If that's not working, try checking out the package(if you really have it):

package Sorting;