Here you can find the source of setFontSizeForComponent(JComponent component, int newFontSize)
public static void setFontSizeForComponent(JComponent component, int newFontSize)
//package com.java2s; /*/*from ww w. j a v a2s.c om*/ * * * Copyright (c) 2014- MHISoft LLC and/or its affiliates. All rights reserved. * * Licensed to MHISoft LLC under one or more contributor * * license agreements. See the NOTICE file distributed with * * this work for additional information regarding copyright * * ownership. MHISoft LLC licenses this file to you under * * the Apache License, Version 2.0 (the "License"); you may * * not use this file except in compliance with the License. * * You may obtain a copy of the License at * * * * http://www.apache.org/licenses/LICENSE-2.0 * * * * 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. * * */ import java.awt.Font; import javax.swing.JComponent; public class Main { public static void setFontSizeForComponent(JComponent component, int newFontSize) { Font original = component.getFont(); Font newFont = original.deriveFont(Float.valueOf(newFontSize)); component.setFont(newFont); } }