Here you can find the source of getMenuFontHeight()
public static int getMenuFontHeight()
//package com.java2s; /*//from w ww.ja v a 2 s . co m * LnFHelper.java * * This file is part of SQL Workbench/J, http://www.sql-workbench.net * * Copyright 2002-2017, Thomas Kellerer * * Licensed under a modified Apache License, Version 2.0 * that restricts the use for certain governments. * You may not use this file except in compliance with the License. * You may obtain a copy of the License at. * * http://sql-workbench.net/manual/license.html * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * * To contact the author please send an email to: support@sql-workbench.net * */ import java.awt.Font; import java.awt.Toolkit; import javax.swing.UIDefaults; import javax.swing.UIManager; public class Main { public static final String MENU_FONT_KEY = "MenuItem.font"; public static int getMenuFontHeight() { return getFontHeight(MENU_FONT_KEY); } private static int getFontHeight(String key) { UIDefaults def = UIManager.getDefaults(); double factor = Toolkit.getDefaultToolkit().getScreenResolution() / 72.0; Font font = def.getFont(key); if (font == null) return 18; return (int) Math.ceil((double) font.getSize() * factor); } }