Here you can find the source of width(JLabel c)
public static int width(JLabel c)
//package com.java2s; /*/*from www . ja va 2s. c om*/ * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ import javax.swing.*; import java.awt.*; public class Main { /** * Gets the width of a given label. */ public static int width(JLabel c) { FontMetrics fm = c.getFontMetrics(c.getFont()); return fm.stringWidth(c.getText()) + 3; } }