How to display 10 numbers per line?

[mazahir]

Hi, I stuck in my program, when user gives start number for example 1 and end number 5 it should print out 1+2+3+4+5 = 15. Everything is fine it does what i want. But i want when it prints out if there is more than 10 numbers it should go to next line. for example like this 1+2+3+4+5+6+7+8+9+10 and next line for 11+12+... Please help!

import javax.swing.JOptionPane;
 
public class Oppgave2{
 
public static void main(String[] args){
 
int x;
int y;
String i, j;
 
i = JOptionPane.showInputDialog("Write start number:");
x = Integer.parseInt(i);
j = JOptionPane.showInputDialog("Write end number");
y = Integer.parseInt(j);
 
if ( x > y || x == y){
 
i = JOptionPane.showInputDialog("Wrong! Start number is bigger than end number!\nTry again! Write start number again:");
x = Integer.parseInt(i);
j = JOptionPane.showInputDialog("Write end number:");
y = Integer.parseInt(j);
 
}
 
int tall;
tall = x;
int sum = 0;
String sumMelding = "";
 
while(tall <= y){
 
    sumMelding = sumMelding + tall + "+";
    sum = sum + tall;
    tall++;
}
 
sumMelding = sumMelding.substring(0, sumMelding.length() - 1);
 
JOptionPane.showMessageDialog(null, sumMelding + " = "  + sum);
 
}
}

[Luuk]

a higher number is wider than a small number, so why do you want a newline after 10 numbers?

A newline after a certain amount of characters

1+2+3+4+5+6+7+8+9+10+
11+12+13+14+15+16+17+
18+19+20+21+22+23+45+
25+26+27+....
 
    ....+84+85+86+87+
88+89+90+91+92+93+94+
95+96+97+98+99+100+
101+102+103+104+105+
106+107+108+109+110
 

[mazahir]

I found the solution ;)

import javax.swing.JOptionPane;
 
public class Oppgave2{
 
public static void main(String[] args){
 
int x;
int y;
String i, j;
int sum = 0;
 
i = JOptionPane.showInputDialog("Write start number:");
x = Integer.parseInt(i);
j = JOptionPane.showInputDialog("Write end number");
y = Integer.parseInt(j);
 
if ( x > y || x == y){
 
i = JOptionPane.showInputDialog("Wrong! Start number is bigger than end number!\nTry again! Write start number again:");
x = Integer.parseInt(i);
j = JOptionPane.showInputDialog("Write end number:");
y = Integer.parseInt(j);
 
        }
String skriv = "";
        for (int a = x; a < y+1; a++){
            sum += a;
 
if( a == y){
 
    skriv += a ;
 
}else{
            skriv += (a) + "+";
        }
        if (a % 10==0){
 
            skriv += "\n" ;
        }
    }
        JOptionPane.showMessageDialog(null, skriv + "=" + sum);
 
 
    }
}