除非你真的很想头疼，否则我建议你利用布局管理系统。
与其尝试设置组件的大小和位置，不如让他们决定在可能的情况下如何显示它们。
虽然我个人利用了 Netbeans 表单设计器，但我鼓励您花时间学习如何手动构建您的 UI，这将为表单设计器可以做什么以及您可以员工制作的想法提供更多的应用高级用户界面 - 恕我直言
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.FlowLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.border.LineBorder;
public class SimpleImageBrowser {
public static void main(String[] args) {
new SimpleImageBrowser();
}
public SimpleImageBrowser() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new SimpleImageBrowser.ImageBrowserPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class ImageBrowserPane extends JPanel {
private JFileChooser fcImage = new JFileChooser();
private SimpleImageBrowser.ImagePane imagePane;
public ImageBrowserPane() {
setLayout(new BorderLayout());
imagePane = new SimpleImageBrowser.ImagePane();
add(new JScrollPane(imagePane));
JButton add = new JButton("Add");
add.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
int state = fcImage.showOpenDialog(SimpleImageBrowser.ImageBrowserPane.this);
switch (state) {
case JFileChooser.APPROVE_OPTION:
File file = fcImage.getSelectedFile();
try {
BufferedImage bi1 = ImageIO.read(file);
ImageIcon icon1 = new ImageIcon(bi1);
JLabel label = new JLabel(icon1);
label.setText(file.getPath());
label.setHorizontalTextPosition(JLabel.CENTER);
label.setVerticalTextPosition(JLabel.BOTTOM);
label.setForeground(Color.WHITE);
label.setBorder(new LineBorder(Color.WHITE));
imagePane.add(label);
imagePane.revalidate();
} catch (Exception exp) {
exp.printStackTrace();
}
}
}
});
JPanel buttons = new JPanel();
buttons.add(add);
add(buttons, BorderLayout.NORTH);
}
}
public class ImagePane extends JPanel {
public ImagePane() {
setLayout(new SimpleImageBrowser.WrapLayout());
setBackground(Color.BLACK);
}
@Override
public Dimension getPreferredSize() {
return getComponentCount() == 0 ? new Dimension(200, 200) : super.getPreferredSize();
}
}
/**
* FlowLayout subclass that fully supports wrapping of components.
*/
public class WrapLayout extends FlowLayout {
private Dimension preferredLayoutSize;
/**
* Constructs a new
* <code>WrapLayout</code> with a left alignment and a default 5-unit
* horizontal and vertical gap.
*/
public WrapLayout() {
super();
}
/**
* Constructs a new
* <code>FlowLayout</code> with the specified alignment and a default 5-unit
* horizontal and vertical gap. The value of the alignment argument must be
* one of
* <code>WrapLayout</code>,
* <code>WrapLayout</code>, or
* <code>WrapLayout</code>.
*
* @param align the alignment value
*/
public WrapLayout(int align) {
super(align);
}
/**
* Creates a new flow layout manager with the indicated alignment and the
* indicated horizontal and vertical gaps.
* <p>
* The value of the alignment argument must be one of
* <code>WrapLayout</code>,
* <code>WrapLayout</code>, or
* <code>WrapLayout</code>.
*
* @param align the alignment value
* @param hgap the horizontal gap between components
* @param vgap the vertical gap between components
*/
public WrapLayout(int align, int hgap, int vgap) {
super(align, hgap, vgap);
}
/**
* Returns the preferred dimensions for this layout given the
* <i>visible</i> components in the specified target container.
*
* @param target the component which needs to be laid out
* @return the preferred dimensions to lay out the subcomponents of the
* specified container
*/
@Override
public Dimension preferredLayoutSize(Container target) {
return layoutSize(target, true);
}
/**
* Returns the minimum dimensions needed to layout the <i>visible</i>
* components contained in the specified target container.
*
* @param target the component which needs to be laid out
* @return the minimum dimensions to lay out the subcomponents of the
* specified container
*/
@Override
public Dimension minimumLayoutSize(Container target) {
Dimension minimum = layoutSize(target, false);
minimum.width -= (getHgap() + 1);
return minimum;
}
/**
* Returns the minimum or preferred dimension needed to layout the target
* container.
*
* @param target target to get layout size for
* @param preferred should preferred size be calculated
* @return the dimension to layout the target container
*/
private Dimension layoutSize(Container target, boolean preferred) {
synchronized (target.getTreeLock()) {
// Each row must fit with the width allocated to the containter.
// When the container width = 0, the preferred width of the container
// has not yet been calculated so lets ask for the maximum.
int targetWidth = target.getSize().width;
if (targetWidth == 0) {
targetWidth = Integer.MAX_VALUE;
}
int hgap = getHgap();
int vgap = getVgap();
Insets insets = target.getInsets();
int horizontalInsetsAndGap = insets.left + insets.right + (hgap * 2);
int maxWidth = targetWidth - horizontalInsetsAndGap;
// Fit components into the allowed width
Dimension dim = new Dimension(0, 0);
int rowWidth = 0;
int rowHeight = 0;
int nmembers = target.getComponentCount();
for (int i = 0; i < nmembers; i++) {
Component m = target.getComponent(i);
if (m.isVisible()) {
Dimension d = preferred ? m.getPreferredSize() : m.getMinimumSize();
// Can't add the component to current row. Start a new row.
if (rowWidth + d.width > maxWidth) {
addRow(dim, rowWidth, rowHeight);
rowWidth = 0;
rowHeight = 0;
}
// Add a horizontal gap for all components after the first
if (rowWidth != 0) {
rowWidth += hgap;
}
rowWidth += d.width;
rowHeight = Math.max(rowHeight, d.height);
}
}
addRow(dim, rowWidth, rowHeight);
dim.width += horizontalInsetsAndGap;
dim.height += insets.top + insets.bottom + vgap * 2;
// When using a scroll pane or the DecoratedLookAndFeel we need to
// make sure the preferred size is less than the size of the
// target containter so shrinking the container size works
// correctly. Removing the horizontal gap is an easy way to do this.
Container scrollPane = SwingUtilities.getAncestorOfClass(JScrollPane.class, target);
if (scrollPane != null && target.isValid()) {
dim.width -= (hgap + 1);
}
return dim;
}
}
/*
* A new row has been completed. Use the dimensions of this row
* to update the preferred size for the container.
*
* @param dim update the width and height when appropriate
* @param rowWidth the width of the row to add
* @param rowHeight the height of the row to add
*/
private void addRow(Dimension dim, int rowWidth, int rowHeight) {
dim.width = Math.max(dim.width, rowWidth);
if (dim.height > 0) {
dim.height += getVgap();
}
dim.height += rowHeight;
}
}
}
我已经WrapLayout被 Rob Camick（潜伏在这个地方）包括在内，因为坦率地说，其他布局管理器都没有给我想要的效果。
我还将标签的文本设置为图像的路径
看看使用布局管理器和布局管理器的视觉指南
看一眼WrapLayout
使用文本字段更新
如果您想将文本字段与图像相关联，那么我建议您将标签和文本字段都添加到 a JPanel（使用类似 a BorderLayout），然后将其添加到图像窗格中......
public class ImagePane extends JPanel {
public ImagePane() {
setLayout(new SimpleImageBrowser.WrapLayout());
setBackground(Color.BLACK);
}
public void addImage(File file) throws IOException {
BufferedImage bi1 = ImageIO.read(file);
ImageIcon icon1 = new ImageIcon(bi1);
JPanel imgPane = new JPanel(new BorderLayout());
imgPane.setOpaque(false);
JLabel label = new JLabel(icon1);
imgPane.add(label);
JTextField field = new JTextField(file.getPath(), 20);
field.setEditable(false);
imgPane.add(field, BorderLayout.SOUTH);
add(imgPane);
revalidate();
}
@Override
public Dimension getPreferredSize() {
return getComponentCount() == 0 ? new Dimension(200, 200) : super.getPreferredSize();
}
}
并且更新ActionListener...
add.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
int state = fcImage.showOpenDialog(SimpleImageBrowser.ImageBrowserPane.this);
switch (state) {
case JFileChooser.APPROVE_OPTION:
File file = fcImage.getSelectedFile();
try {
imagePane.addImage(file);
} catch (IOException ex) {
ex.printStackTrace();
}
}
}
});