隐藏其他组件(例如按钮标签等)的背景图片，反之亦然 [英] background image hidding the other components like buttons labels and other, and vicce versa
问题描述
- 如何解决此代码中的组件隐藏问题
- 代码正在正常运行
- 但未显示背景图片
- 如何更改代码以获取背景图像
-
使用验证方法时，其在validate()中创建错误
- how to solve hidding of components in this code
- code is running without errors
- but background image not displayed
- how to change code to get the background image
when using validation method, its creating error in validation()
public class TEST{
public TEST() {
String[] strm = {"Jan", "Feb", "Mar", "Apr", "May"};
String[] stry = {"2016", "2017", "2018","2019"};
String[] strf={"NEW Delhi", "Bangalore", "Chennai"};
String[] strt={"Goa","Kashmir","Hyderabad"};
JFrame f = new JFrame("test");
f.setSize(500, 500);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JLabel lfr = new JLabel("FROM");
JLabel lto = new JLabel("TO");
JLabel lda = new JLabel("DATE");
JLabel ld = new JLabel("DAY");
JLabel lm = new JLabel("MONTH");
JLabel y = new JLabel("YEAR");
JComboBox cfr = new JComboBox(strf);
JComboBox cto = new JComboBox(strt);
JComboBox cd = new JComboBox();
JComboBox cm = new JComboBox(strm);
JComboBox cy = new JComboBox(stry);
JButton bs = new JButton("Search");
JPanel p1 = new JPanel(null);
p1.setPreferredSize(new Dimension(500,500));
JLabel jimage = new JLabel();
jimage.setIcon(new ImageIcon("air.jpg"));
for(int i = 1; i <= 31; i++)
cd.addItem(i);
lfr.setBounds(20, 40, 100, 20);
cfr.setBounds(100, 40, 100, 20);
lto.setBounds(20, 100, 25, 20);
cto.setBounds(100, 100, 100, 20);
lda.setBounds(20, 160, 50, 20);
cd.setBounds(100, 160, 50, 20);
cm.setBounds(160, 160, 65, 20);
cy.setBounds(240, 160, 75, 20);
ld.setBounds(100, 190, 50, 20);
lm.setBounds(160, 190, 50, 20);
y.setBounds(240, 190, 50, 20);
bs.setBounds(20, 230, 100, 20);
p1.add(lfr);
p1.add(cfr);
p1.add(lto);
p1.add(cto);
p1.add(lda);
p1.add(cd);
p1.add(cm);
p1.add(cy);
p1.add(ld);
p1.add(lm);
p1.add(y);
p1.add(bs);
p1.add(jimage);
// validate();
f.add(p1);
f.setVisible(true);
}
public static void main(String[] args) {
new TEST();
}
}
推荐答案
您能做的最好的事情是:
The best you can do is something like:
import java.awt.FlowLayout;
import java.awt.GridLayout;
import javax.swing.BoxLayout;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class Test {
JLabel label;
JComboBox combo;
JButton button;
JPanel pane;
JFrame frame;
JPanel create1stRow() {
JPanel pane = new JPanel();
pane.setLayout(new FlowLayout(FlowLayout.LEFT));
pane.setOpaque(false);
String options[] = {"New Delhi", "Bangalore", "Chennai"};
label = new JLabel("FROM");
combo = new JComboBox(options);
pane.add(label);
pane.add(combo);
return pane;
}
JPanel create2ndRow() {
JPanel pane = new JPanel();
pane.setLayout(new FlowLayout(FlowLayout.LEFT));
pane.setOpaque(false);
String options[] = {"Goa", "Kashmir", "Hyderabad"};
label = new JLabel("TO");
combo = new JComboBox(options);
pane.add(label);
pane.add(combo);
return pane;
}
JPanel create3rdRow() {
JPanel pane = new JPanel();
JPanel dataPane = new JPanel();
pane.setLayout(new FlowLayout(FlowLayout.LEFT));
pane.setOpaque(false);
dataPane.setOpaque(false); //forgot to add this line when I took the pic
dataPane.setLayout(new GridLayout(2, 3)); //2 rows, 3 cols, so we can have the combos with their text aligned
String days[] = {"1", "2", "3", "4", "5"}; //Too lazy to write 31 days
String months[] = {"Jan", "Feb", "Mar", "Apr", "May"}; //Too lazy to write 12 months
String years[] = {"2016", "2017", "2018", "2019", "2020"};
label = new JLabel("DATE");
combo = new JComboBox(days);
//We add the combos
dataPane.add(combo);
combo = new JComboBox(months); //We're reusing the object, but change the data
dataPane.add(combo);
combo = new JComboBox(years); //The same as above
dataPane.add(combo);
//Now we add the labels
dataPane.add(new JLabel("DAYS"));
dataPane.add(new JLabel("MONTHS"));
dataPane.add(new JLabel("YEARS"));
pane.add(label);
pane.add(dataPane); //We add the whole pane to another one
return pane;
}
JPanel create4thRow() {
JPanel pane = new JPanel();
pane.setLayout(new FlowLayout(FlowLayout.LEFT));
pane.setOpaque(false);
button = new JButton("Search");
pane.add(button);
return pane;
}
public Test() {
frame = new JFrame("Test");
frame.setContentPane(new JLabel(new ImageIcon("C:/Users/Frakcool/workspace/StackOverflowProjects/src/test/Air.jpg")));
frame.getContentPane().setLayout(new BoxLayout(frame.getContentPane(), BoxLayout.PAGE_AXIS));
pane = create1stRow();
frame.add(pane);
pane = create2ndRow();
frame.add(pane);
pane = create3rdRow();
frame.add(pane);
pane = create4thRow();
frame.add(pane);
frame.pack();
//frame.setSize(500, 500); //If your image is too large use this
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main (String args[]) {
new Test();
}
}
如您在上面的代码中看到的，我没有使用null layout，而是多个
As you can see in the above code, I'm not using a null layout but a combination of multiple Layout Managers and I suggest you to do it like this in the future.
但是，如果您仍然想使用该丑陋的null布局，那么您将缺少以下行:
But if you still want to use that ugly null layout, you were missing this line:
jimage.setBounds(0, 0, 500, 500);
在此之前:
lfr.setBounds(20, 40, 100, 20);
我上面的代码给出的输出是:
The output that my above code gives is:
您的代码加上我添加的代码行给出的输出是:
And the output given by your code with the line I added is:
如您所见，两者确实非常相似，我本可以将它们做的完全相同，但是我没有足够的时间这样做，但是您可以结合上面发布的版式管理器.
As you can see, both are really similar, and I could have done them identical but I don't have enough time to do so, but you can by combining the Layout Managers I posted above.
注意:我忘了提到要使该程序显示背景图像，我需要使用pane.setOpaque(false);使其他所有面板都不透明，因此，请确保在需要时使用此面板来显示其他面板后面的内容.
Note: I forgot to mention that to make this program to show the background image, I needed to make every other panels not opaque with pane.setOpaque(false); so, be sure to use this whenever you need to show something that is behind another panel.
这篇关于隐藏其他组件(例如按钮标签等)的背景图片，反之亦然的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
