JComboBox和字符串格式

Question

I've been trying to use String.format to display in the JComboBox, something like this:

@Override
public String toString(){ return String.format("%-40s %4d", title, n); }

But the result is: JComboBox's appearance

Is there a way to fix this?

Edit: Desired output

Answer 1

Try this when on your addItem:

cmb1.addItem(String.format("%-40s %39d", "123",123)); // %4d to %39d
cmb1.addItem(String.format("%-40s %4d", "123456789012345678901234567890",-12));

It is different in console and when you add it in JComboBox because in console, It will automatically find the largest length and pad spaces to the other String you format, but in JComboBox , you need to manually change your second argument to align to the next Item in JComboBox .