Here you can find the source of fit(JDialog d)
public static void fit(JDialog d)
//package com.java2s; /*//from w w w . j a v a 2 s. c o m * Copyright 2007 - 2012 the original author or authors. * * Licensed 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.Dimension; import java.awt.Toolkit; import javax.swing.JDialog; public class Main { public static void fit(JDialog d) { try { // Get the size of the screen Dimension dim = Toolkit.getDefaultToolkit().getScreenSize(); int hd = d.getY() + d.getHeight() - (dim.height - 80); if (hd > 0) { d.setSize(d.getWidth(), Math.max(d.getHeight() - hd, 150)); } } catch (Throwable t) { // ignore } } }