[英]Java multiple CheckBoxes
我有多個CheckBoxes的問題。 當我用代碼創建它們時,它僅顯示最后一個框“ bolonska zmes”,而其他框僅在鼠標懸停時顯示。 我認為這可能與圖層有關,但是我不知道該怎么辦。 謝謝你的幫助。
public class OknoPizzaVlastna extends JFrame
{
private String nazvy[] = { "cesnak", "feferony", "hrasok", "cibula",
"kecup", "tatarskaOmacka", "vajce",
"kapia", "fazula", "kukurica", "ananas", "brokolica",
"Niva", "Mozarella", "olivy", "inovec udeny", "articoky",
"klobasa", "sampiony", "salama", "slanina", "hranolky", "tuniak",
"sunka", "kuracie maso", "syr", "Morska zmes", "bolonska zmes"};
private JCheckBox boxes[];
public OknoPizzaVlastna()
{
boxes = new JCheckBox[nazvy.length];
for (int i = 0; i < nazvy.length; i++)
{
createrCheckBox(i);
}
setTitle("Vlastna Pizza");
setSize(480,320);
setVisible(true);
setResizable(true);
getContentPane().setLayout(null);
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
}
public void createrCheckBox(int i)
{
boxes[i] = new JCheckBox();
//proper locations will be solved later
boxes[i].setLocation(62+i*30,54+i*20);
boxes[i].setSize(100,50);
boxes[i].setText(nazvy[i]);
boxes[i].setSelected(false);
boxes[i].setVisible(true);
getContentPane().add(boxes[i]);
}
}
如果問題是“如何布置此GUI?” 答案可能是:
要為健壯的GUI組織組件,請使用布局管理器或它們的組合 ,以及用於空白的布局填充和邊框。
在這種情況下,我們使用單列GridLayout
,每個復選框上都帶有一個EmptyBorder
,以便在我們沿着菜單進行下移時依次縮進更大的數量。
import java.awt.*;
import javax.swing.*;
import javax.swing.border.*;
public class OknoPizzaVlastna extends JFrame {
private String nazvy[] = {
"cesnak", "feferony", "hrasok", "cibula",
"kecup", "tatarskaOmacka", "vajce",
"kapia", "fazula", "kukurica", "ananas", "brokolica",
"Niva", "Mozarella", "olivy", "inovec udeny", "articoky",
"klobasa", "sampiony", "salama", "slanina", "hranolky", "tuniak",
"sunka", "kuracie maso", "syr", "Morska zmes", "bolonska zmes"
};
JPanel ui= new JPanel(new GridLayout(0,1,4,4));
private JCheckBox boxes[];
public OknoPizzaVlastna() {
ui.setBorder(new EmptyBorder(10,10,10,10));
setContentPane(ui);
boxes = new JCheckBox[nazvy.length];
for (int i = 0; i < nazvy.length; i++) {
createrCheckBox(i);
}
setTitle("Vlastna Pizza");
pack();
setVisible(true);
setResizable(true);
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
}
public void createrCheckBox(int i) {
boxes[i] = new JCheckBox(nazvy[i]);
boxes[i].setBorder(new EmptyBorder(0,i*30,0,0));
ui.add(boxes[i]);
}
public static void main(String[] args) {
Runnable r = new Runnable() {
public void run() {
JFrame frame = new OknoPizzaVlastna();
}
};
SwingUtilities.invokeLater(r);
}
}
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