String Formatting on JOptionPane.showMessageDialog

**Onur** · September 23rd, 2011, 07:42 AM

Hello, i want to display a formatted string on dialog box. I formatted the string with using

String.format("%" + width + "s", str);

It wotks fine with System.out.println but not working on dialog box. Here is the code and screen shot.

 
//I use this method to format String
public static String leftPad(String str, int width) {
        return String.format("%" + width + "s", str);
}
public static String rightPad(String str, int width) {
        return String.format("%-" + width + "s", str);
}

//Here where i invoke the formatting method
 public String printAddedCourses(){
 
        String str = "";
 
        //String str = Arrays.toString(addedCourses);
        for(int i=0; addedCourses[i] != null; 
 
            str += rightPad(addedCourses[i], 14);
            str += rightPad(Integer.toString(addedCredits[i]), 17);
            str += rightPad(addedCourseNames[i], 64);
            str += addedInstructors[i];
            str += "\n";
 
        }
 
        if( str.equals("")==true)
            return "None\n";
 
        return str;
    }

 
//In here it displays the dialog message BUT NOT FORMATTED !
if( check == false){
            JOptionPane.showMessageDialog(frame,
                            "<HTML><FONT color=\"red\">Selected Courses:</FONT></HTML>"
                            +"\n"+printAddedCourses() //IT HAVE TI PRINT HERE
                            +"Total Credits: "+totalCredit
                            +"\n\n<HTML><FONT color=\"red\">Conflicts:</FONT></HTML> \nNone" 
                            , "Analyze", JOptionPane.INFORMATION_MESSAGE);
            System.out.println(printAddedCourses());
        }
        else if (check == true){
            JOptionPane.showMessageDialog(frame,
                            "<HTML><FONT color=\"red\">Selected Courses:"
                            +"\n"+printAddedCourses() //IT HAVE TI PRINT HERE
                            +"Total Credits: "+totalCredit
                            +"\n\n<HTML><FONT color=\"red\">Conflicts:</FONT></HTML> \n"+printConflictedCourses() 
                            , "Analyze", JOptionPane.INFORMATION_MESSAGE);
            System.out.println(printAddedCourses());
        }

This is from dialog box window, it is printing wrong !
ss.jpg

This is the Console show, here it is working correctly !
ss2.jpg

So where am i doing wrong ?

**Mrc0d3r** · September 23rd, 2011, 07:57 AM

And where's the definition of method rightPad() ?

**Onur** · September 23rd, 2011, 08:04 AM

Sorry about that, i forgot it. I added it to first code block.

**BuhRock** · September 23rd, 2011, 08:39 AM

Could you not use the StringBuffer class to append the into to the string? Then just put the String variable in the dialogbox, instead of calling a method?

Like this:

	     String x = new StringBuffer().append("a").append(4).append("c")
                 .toString();
 
	     JOptionPane.showMessageDialog(null, x);

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