Here you can find the source of titledBorder(String title, B comp)
public static <B extends javax.swing.JComponent> B titledBorder(String title, B comp)
//package com.java2s; /*/*from www . ja va 2 s . com*/ * This file is part of CRISIS, an economics simulator. * * Copyright (C) 2015 AITIA International, Inc. * * CRISIS 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. * * CRISIS 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 CRISIS. If not, see <http://www.gnu.org/licenses/>. */ import javax.swing.BorderFactory; public class Main { public static <B extends javax.swing.JComponent> B titledBorder(String title, B comp) { comp.setBorder(BorderFactory.createTitledBorder(title)); return comp; } }