Here you can find the source of getSplitPaneSize(JSplitPane splitPane)
public static int getSplitPaneSize(JSplitPane splitPane)
//package com.java2s; /*/* www .j a v a 2 s. c o m*/ * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ import javax.swing.JSplitPane; public class Main { public static int getSplitPaneSize(JSplitPane splitPane) { if (splitPane == null) { return 0; } boolean horiz = splitPane.getOrientation() == JSplitPane.HORIZONTAL_SPLIT ? true : false; return horiz ? splitPane.getWidth() : splitPane.getHeight(); } }