Java 获取向容器添加窗口时出错
我正在尝试创建一个JavaSwing应用程序,它可以在单击按钮时显示一个表。我收到“将窗口添加到容器”错误。我知道我可能应该尝试添加一个JPanel而不是JFrame,但我的努力不起作用。任何帮助都将不胜感激。下面是代码Java 获取向容器添加窗口时出错,java,swing,jframe,Java,Swing,Jframe,我正在尝试创建一个JavaSwing应用程序,它可以在单击按钮时显示一个表。我收到“将窗口添加到容器”错误。我知道我可能应该尝试添加一个JPanel而不是JFrame,但我的努力不起作用。任何帮助都将不胜感激。下面是代码 import java.awt.Dimension; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable;
import java.awt.Dimension;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
/**
*
* @author Courtney
* javax.swing.JFrame
*/
public class TablePractice extends javax.swing.JFrame {
/**
* Creates new form TablePractice
*/
public TablePractice() {
initComponents();
String[] columnNames = {"First Name",
"Last Name",
"Sport",
"# of Years",
"Vegetarian"};
Object[][] data = {
{"Kathy", "Smith",
"Snowboarding", new Integer(5), new Boolean(false)},
{"John", "Doe",
"Rowing", new Integer(3), new Boolean(true)},
{"Sue", "Black",
"Knitting", new Integer(2), new Boolean(false)},
{"Jane", "White",
"Speed reading", new Integer(20), new Boolean(true)},
{"Joe", "Brown",
"Pool", new Integer(10), new Boolean(false)}
};
final JTable table = new JTable(data, columnNames);
table.setPreferredScrollableViewportSize(new Dimension(500, 70));
table.setFillsViewportHeight(true);
//Create the scroll pane and add the table to it.
JScrollPane scrollPane = new JScrollPane(table);
//Add the scroll pane to this panel.
add(scrollPane);
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jButton1 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jButton1.setText("Get Table");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jButton1)
.addContainerGap(311, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(19, 19, 19)
.addComponent(jButton1)
.addContainerGap(258, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
//Create and set up the window.
//JPanel panel = new JPanel();
JFrame frame = new JFrame("TablePractice");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Create and set up the content pane.
TablePractice newContentPane = new TablePractice();
//newContentPane.setOpaque(true); //content panes must be opaque
frame.getContentPane().add(newContentPane);
//frame.setContentPane(newContentPane);
//Display the window.
frame.pack();
frame.setVisible(true);
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(TablePractice.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(TablePractice.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(TablePractice.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(TablePractice.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new TablePractice().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
// End of variables declaration
}
导入java.awt.Dimension;
导入javax.swing.JFrame;
导入javax.swing.JPanel;
导入javax.swing.JScrollPane;
导入javax.swing.JTable;
/*
*要更改此许可证标题,请在“项目属性”中选择“许可证标题”。
*要更改此模板文件,请选择工具|模板
*然后在编辑器中打开模板。
*/
/**
*
*@作者考特尼
*javax.swing.JFrame
*/
公共类TablePractice扩展了javax.swing.JFrame{
/**
*创建新的表格练习
*/
公共实践(){
初始化组件();
String[]columnNames={“名字”,
“姓氏”,
“运动”,
“#年”,
“素食者”};
对象[][]数据={
{“凯西”,“史密斯”,
“滑雪板”,新整数(5),新布尔值(假)},
{“约翰”,“多伊”,
“划船”,新整数(3),新布尔值(真)},
{“苏”,“黑”,
“编织”,新整数(2),新布尔值(假)},
{“简”、“白”,
“快速读取”,新整数(20),新布尔值(真)},
{“乔”,“布朗”,
“Pool”、新整数(10)、新布尔值(false)}
};
最终JTable表=新JTable(数据、列名称);
表.setPreferredScrollableViewportSize(新维度(500,70));
表.setFillsViewPerthweight(真);
//创建滚动窗格并将表添加到其中。
JScrollPane scrollPane=新的JScrollPane(表);
//将滚动窗格添加到此面板。
添加(滚动窗格);
}
/**
*从构造函数中调用此方法来初始化表单。
*警告:不要修改此代码。此方法的内容始终为
*由表单编辑器重新生成。
*/
@抑制警告(“未选中”)
//
私有组件(){
jButton1=newjavax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jButton1.setText(“Get Table”);
jButton1.addActionListener(新java.awt.event.ActionListener(){
public void actionPerformed(java.awt.event.ActionEvent evt){
jButton1ActionPerformed(evt);
}
});
javax.swing.GroupLayout=newjavax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(布局);
layout.setHorizontalGroup(
createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jButton1)
.addContainerGap(311,简称最大值))
);
layout.setVerticalGroup(
createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(19,19,19)
.addComponent(jButton1)
.addContainerGap(258,简称最大值))
);
包装();
}//
私有void jButton1ActionPerformed(java.awt.event.ActionEvent evt){
//创建并设置窗口。
//JPanel面板=新的JPanel();
JFrame=新JFrame(“表格练习”);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//创建并设置内容窗格。
TablePractice newContentPane=新建TablePractice();
//newContentPane.setOkable(true);//内容窗格必须是不透明的
frame.getContentPane().add(newContentPane);
//frame.setContentPane(newContentPane);
//显示窗口。
frame.pack();
frame.setVisible(true);
}
/**
*@param指定命令行参数
*/
公共静态void main(字符串参数[]){
/*设置Nimbus的外观和感觉*/
//
/*如果Nimbus(在JavaSE6中引入)不可用,请使用默认的外观。
*详情请参阅http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
试一试{
for(javax.swing.UIManager.LookAndFeelInfo:javax.swing.UIManager.getInstalledLookAndFeels()){
if(“Nimbus”.equals(info.getName())){
setLookAndFeel(info.getClassName());
打破
}
}
}捕获(ClassNotFoundException ex){
getLogger(TablePractice.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);
}catch(实例化异常){
getLogger(TablePractice.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);
}捕获(非法访问例外){
getLogger(TablePractice.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);
}catch(javax.swing.UnsupportedLookAndFeelException ex){
getLogger(TablePractice.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);
}
//
/*创建并显示表单*/
invokeLater(new Runnable()){
公开募捐{
新建TablePractice().setVisible(true);
}
});
}
//变量声明-不修改
私有javax.swing.JButton jButton1;
//变量结束声明
}
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