Swing中JInternalFrame窗口平铺、级联等实现

import java.awt.Dimension;import java.beans.PropertyVetoException;import java.util.ArrayList;import javax.swing.JDesktopPane;import javax.swing.JInternalFrame;public class FrameLayerManager {    private static ArrayList<JInternalFrame> getVisibleFrameList(JDesktopPane desktopPane) {        JInternalFrame[] allframes = desktopPane.getAllFrames();        ArrayList<JInternalFrame> list = new ArrayList<>();        for (JInternalFrame eachFrame : allframes) {            if (eachFrame.isVisible()) {                list.add(eachFrame);            }        }        return list;    }    public static void cascade(JDesktopPane desktopPane) {        ArrayList<JInternalFrame> list = getVisibleFrameList(desktopPane);        int count = list.size();        if (count == 0) {            return;        }        for (int i = 0; i < count; i++) {            JInternalFrame f = list.get(count - i - 1);            if (!f.isClosed() && f.isIcon()) {                try {                    f.setIcon(false);                } catch (PropertyVetoException ignored) {                }            }            Dimension size = desktopPane.getSize();            desktopPane.getDesktopManager().resizeFrame(f, i * 30, i * 30,                    size.width - count * 30, size.height - count * 30);        }    }    public static void horizontal(JDesktopPane desktopPane) {        ArrayList<JInternalFrame> list = getVisibleFrameList(desktopPane);        int count = list.size();        if (count == 0) {            return;        }        Dimension size = desktopPane.getSize();        for (int i = 0; i < count; i++) {            JInternalFrame f = list.get(i);            if (!f.isClosed() && f.isIcon()) {                try {                    f.setIcon(false);                } catch (PropertyVetoException ignored) {                }            }            desktopPane.getDesktopManager().resizeFrame(f, 0,                    size.height * i / count, size.width, size.height / count);        }    }    public static void vertical(JDesktopPane desktopPane) {        ArrayList<JInternalFrame> list = getVisibleFrameList(desktopPane);        int count = list.size();        if (count == 0)            if (count == 0) {                return;            }        Dimension size = desktopPane.getSize();        for (int i = 0; i < count; i++) {            JInternalFrame f =  list.get(i);            if (!f.isClosed() && f.isIcon()) {                try {                    f.setIcon(false);                } catch (PropertyVetoException ignored) {                }            }            desktopPane.getDesktopManager().resizeFrame(f,                    size.width * i / count, 0, size.width / count, size.height);        }    }    public static void arrangeAll(JDesktopPane desktopPane) {        ArrayList<JInternalFrame> list = getVisibleFrameList(desktopPane);        int count = list.size();        if (count == 0) {            return;        }        int sqrt = (int) Math.sqrt(count);        int rows = sqrt;        int cols = sqrt;        if (rows * cols < count) {            cols++;            if (rows * cols < count) {                rows++;            }        }        Dimension size = desktopPane.getSize();        int w = size.width / cols;        int h = size.height / rows;        int x = 0;        int y = 0;        for (int i = 0; i < rows; i++) {            for (int j = 0; j < cols && ((i * cols) + j < count); j++) {                JInternalFrame f = list.get((i * cols) + j);                if (!f.isClosed() && f.isIcon()) {                    try {                        f.setIcon(false);                    } catch (PropertyVetoException ignored) {                    }                }                desktopPane.getDesktopManager().resizeFrame(f, x, y, w, h);                x += w;            }            y += h;            x = 0;        }    }}