Java 使用我的JPanel的问题
我正在用Netbeans制作一个图形界面,您可以在文本字段“punten”中输入一系列数字(例如:7 8 5 4 10 13),当您按下按钮“ververs”时,所有数字的图形折线图都会出现(在我的面板中)。我制作了一个类“Gui”,它通过文本字段、按钮和面板扩展JFrame。我还创建了一个类“Grafiek”,它扩展了JPanel,并与我的“Gui”中的面板相链接。图表将显示在JFrame中显示的JPanel上 我遇到的问题是:重新油漆();命令不会转到paintComponent(Graphics g)-方法,我的私有变量也不会更改(无论我在文本框中输入了什么变量,punt和punti的长度都保持为1) 有人能帮帮我吗?我已经做这个项目好几天了 我的Gui类:Java 使用我的JPanel的问题,java,swing,jpanel,paintcomponent,repaint,Java,Swing,Jpanel,Paintcomponent,Repaint,我正在用Netbeans制作一个图形界面,您可以在文本字段“punten”中输入一系列数字(例如:7 8 5 4 10 13),当您按下按钮“ververs”时,所有数字的图形折线图都会出现(在我的面板中)。我制作了一个类“Gui”,它通过文本字段、按钮和面板扩展JFrame。我还创建了一个类“Grafiek”,它扩展了JPanel,并与我的“Gui”中的面板相链接。图表将显示在JFrame中显示的JPanel上 我遇到的问题是:重新油漆();命令不会转到paintComponent(Graph
package grafiek;
import java.awt.Graphics;
import javax.swing.JPanel;
public class Gui extends javax.swing.JFrame {
private Grafiek newJPanel;
/**
* Creates new form Gui
*/
public Gui() {
initComponents();
newJPanel = new Grafiek();
}
/**
* 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() {
punten = new javax.swing.JTextField();
fout = new javax.swing.JLabel();
javax.swing.JButton ververs = new javax.swing.JButton();
panel = new Grafiek();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
fout.setText("j");
ververs.setText("Ververs");
ververs.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
verversActionPerformed(evt);
}
});
panel.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0), 2));
javax.swing.GroupLayout panelLayout = new javax.swing.GroupLayout(panel);
panel.setLayout(panelLayout);
panelLayout.setHorizontalGroup(
panelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 0, Short.MAX_VALUE)
);
panelLayout.setVerticalGroup(
panelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 195, Short.MAX_VALUE)
);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(panel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(punten, javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.LEADING, layout.createSequentialGroup()
.addComponent(ververs)
.addGap(6, 6, 6)
.addComponent(fout)
.addGap(0, 302, Short.MAX_VALUE)))
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(punten, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(panel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(fout)
.addComponent(ververs))
.addContainerGap())
);
pack();
}// </editor-fold>
private void verversActionPerformed(java.awt.event.ActionEvent evt) {
newJPanel.verwerkData(punten.getText());
}
/**
* @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(Gui.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(Gui.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(Gui.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(Gui.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 Gui().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JLabel fout;
private javax.swing.JPanel panel;
private javax.swing.JTextField punten;
// End of variables declaration
}
package-grafiek;
导入java.awt.Graphics;
导入javax.swing.JPanel;
公共类Gui扩展了javax.swing.JFrame{
私人格拉菲克·纽杰帕内尔;
/**
*创建新表单Gui
*/
公共图形用户界面(){
初始化组件();
newJPanel=new-Grafiek();
}
/**
*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(){
punten=newjavax.swing.JTextField();
fout=newjavax.swing.JLabel();
javax.swing.JButton ververs=新的javax.swing.JButton();
面板=新格拉菲克();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
fout.setText(“j”);
ververs.setText(“ververs”);
addActionListener(新java.awt.event.ActionListener(){
public void actionPerformed(java.awt.event.ActionEvent evt){
执行的转换(evt);
}
});
setboorder(javax.swing.BorderFactory.createLineBorder(新java.awt.Color(0,0,0,2));
javax.swing.GroupLayout panelLayout=新建javax.swing.GroupLayout(panel);
panel.setLayout(panelLayout);
panelLayout.setHorizontalGroup(
createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0,0,短.MAX_值)
);
panelLayout.setVerticalGroup(
createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0,195,短。最大值)
);
javax.swing.GroupLayout=newjavax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(布局);
layout.setHorizontalGroup(
createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING,layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.training)
.addComponent(面板,javax.swing.GroupLayout.DEFAULT\u SIZE,javax.swing.GroupLayout.DEFAULT\u SIZE,Short.MAX\u值)
.addComponent(punten、javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.LEADING,layout.createSequentialGroup()
.addComponent(ververs)
.addGap(6,6,6)
.addComponent(fout)
.addGap(0,302,短.MAX_值)))
.addContainerGap())
);
layout.setVerticalGroup(
createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(punten,javax.swing.GroupLayout.PREFERRED\u SIZE,javax.swing.GroupLayout.DEFAULT\u SIZE,javax.swing.GroupLayout.PREFERRED\u SIZE)
.addGap(18,18,18)
.addComponent(面板,javax.swing.GroupLayout.DEFAULT\u SIZE,javax.swing.GroupLayout.DEFAULT\u SIZE,Short.MAX\u值)
.addGap(18,18,18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(fout)
.addComponent(ververs))
.addContainerGap())
);
包装();
}//
private void VerversationPerformed(java.awt.event.ActionEvent evt){
newJPanel.verwerkData(punten.getText());
}
/**
*@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(Gui.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);
}catch(实例化异常){
getLogger(Gui.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);
}捕获(非法访问例外){
getLogger(Gui.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);
}catch(javax.swing.UnsupportedLookAndFeelException ex){
getLogger(Gui.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Gui().setVisible(true);
}
});
}
//变量声明-不修改
私有javax.swing.JLabel fout;
私有javax.swing.JPanel面板;
私有javax.swing.JTex
package grafiek;
import java.awt.Graphics;
public class Grafiek extends javax.swing.JPanel {
private String[] punt;
private int[] punti;
private int afstandX, afstandY, puntX1, puntY1, puntX2, puntY2;
private int max;
/**
* Creates new form Grafiek
*/
public Grafiek() {
initComponents();
punt = new String[1];
punti = new int[1];
afstandX = 0;
afstandY = 0;
puntX1 = 0;
puntY1 = 0;
puntX2 = 0;
puntY2 = 0;
max = 1;
}
@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
for(int i=0; i<punti.length; i++) {
if(max <= punti[i]) {
max = punti[i];
}
}
afstandX = getWidth()/punt.length;
afstandY = getHeight()/max;
for(int i=0; i<punti.length; i++) {
puntX1 = puntX2;
if(i == 0) {
puntY1 = getHeight();
}
else puntY1 = puntY2;
puntX2 += afstandX;
puntY2 = getHeight() - punti[i]*afstandY;
g.drawLine(puntX1, puntY1, puntX2, puntY2);
}
puntX2 = 0;
}
public void verwerkData(String s) {
punt = s.split(" ");
punti = new int[punt.length];
for(int i=0; i<punt.length; i++) {
punti[i] = Integer.parseInt(punt[i]);
}
repaint();
}
/**
* 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() {
setBackground(new java.awt.Color(255, 255, 255));
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
this.setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 400, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 300, Short.MAX_VALUE)
);
}// </editor-fold>
}
newJPanel = new Grafiek();
private void verversActionPerformed(java.awt.event.ActionEvent evt) {
newJPanel.verwerkData(punten.getText());
}
panel = new Grafiek();
newJPanel.verwerkData(punten.getText());
panel.verwerkData(punten.getText());