Tag: PLAIN

When i run my code i get this error: Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: How do I fix this? this is my code so far:

import java.awt.Font;
import javax.swing.*;

public class Program7

public static void showOutput(String output) {
    JTextArea jta = new JTextArea(output);
    jta.setFont(new Font("Consolas", Font.PLAIN, 60));
    JOptionPane.showMessageDialog(null, jta);
}

public static int getHighest(int x[]) {
    int hi = x[0];
    for (int i = 1; i < x.length; i++) {
        if (x[i] > hi) {
            hi = x[i];
        }
    }
    return hi;
}
public static int getLowest(int x[]) {
    int low = x[0];
    for (int i = 1; i < x.length; i++) {
        if (x[i] < low) {
            low = x[i];
        }
    }
    return low;
}

public static int[] getGrades(String input) {
    String data[] = input.trim().split("\\s+");
    int x[] = new int[data.length / 2];
    for (int i = 1; i < data.length; i += 2) {
        if (data[i].matches("\\d+")) {
            x[i / 2] = Integer.parseInt(data[i]);
        } else {
            System.err.println("inpiy error");
        }
    }
    return x;
}

public static int[] sortSelection(int x[]) {
    for (int i = 0; i < x.length - 1; i++) {
        int largest = i;
        for (int j = largest + 1; j < x.length; j++) {
            if (x[j] > x[largest]) {
                largest = j;
            }
        }
        int tmp = x[largest];
        x[largest] = x[i];
        x[i] = tmp;
    }
    return x;
}

public static int[] sortBubble(int x[]) {
    for (int i = 0; i < x.length - 1; i++) {
        for (int j = 0; j < x.length - 1; j++) {
            if (x[j + 1] > x[j]) {
                int tmp = x[j + 1];
                x[j + 1] = x[j];
                x[j] = tmp;
            }
        }
    }
    return x;
}

public static int[] getData(String input) {
    String data[] = input.trim().split("\\s+");
    int x[] = new int[data.length];
    for (int i = 0; i < data.length; i++) {
        try {
            x[i] = Integer.parseInt(data[i]);
        } catch (NumberFormatException nfe) {
            System.err.println(nfe.getMessage());
            x[i] = 0;

        }
    }
    return x;
}

public static float getAverage(int x[]) {
    float total = 0;
    for (int i = 0; i < x.length; i++) {
        total += x[i];
    }
    return total / x.length;
}

public static String putArray(String names[], int x[]) {
    String result = "";
    for (int i = 0; i < x.length; i++) {
        result += names[i] + "\t" + x[i] + "\n";
        System.out.println(x);
    }
    return result;
}

public static int[] sortToHigh(int x[]) {
    for (int i = 0; i < x.length - 1; i++) {
        int largest = i;
        for (int j = largest + 1; j < x.length; j++) {
            if (x[j] > x[largest]) {
                largest = j;
            }
        }
        int tmp = x[largest];
        x[largest] = x[i];
        x[i] = tmp;
    }
    return x;
}

public static int[] sortBubbleByGrade(String names[], int x[]) {
    for (int i = 0; i < x.length; i++) 
    for (int j = 0; j < x.length; j++) 
            if (x[j + 1] > x[j]) {
                int tmp = x[j + 1];
                x[j + 1] = x[j];
                x[j] = tmp;

                String tmpname = names[j];
                names[j] = names[j + 1];
                names[j + 1] = tmpname;

    }
    return x;
}

public static int[] sortToLow(int x[]) {
    for (int i = 0; i < x.length - 1; i++) {
        int smallest = i;
        for (int j = smallest + 1; j < x.length; j++) {
            if (x[j] < x[smallest]) {
                smallest = j;
            }
        }
        int tmp = x[smallest];
        x[smallest] = x[i];
        x[i] = tmp;
    }
    return x;
}

public static String[] getNames(String input) {
    String data[] = input.trim().split("\\s+");
    String x[] = new String[data.length / 2];
    for (int i = 0; i < data.length; i += 2) {
        x[i / 2] = data[i];
    }
    return x;
}

public static int[] sortByName(String names[], int x[]) {
    for (int i = 0; i < x.length - 1; i++) {
        for (int j = 0; j < x.length - 1; j++) {
            if (names[j + 1].compareTo(names[j]) < 0) {
                int tmp = x[j + 1];
                x[j + 1] = x[j];
                x[j] = tmp;

                String tmpname = names[j];
                names[j] = names[j + 1];
                names[j + 1] = tmpname;
            }
        }
    }
    return x;
}

public static void main(String[] args) {

    String input = JOptionPane.showInputDialog("Enter 1 or more names and grades");
    String names[] = getNames(input);
    int grades[] = getGrades(input);
    sortBubbleByGrade(names, grades);
    String output = "Name \t Grades \n" + putArray(names, sortToHigh(grades));
    sortByName(names, grades);
    showOutput(output + "\nsorted\n" + putArray(names, grades) + String.format("\nAverage:%3.2\n"
            + "Highest:%d\n" + "Lowest:%d\n", getAverage(grades), getHighest(grades), getLowest(grades)));

}