现在，在我在源代码中进行了此处和那里的更正后，程序运行良好。不知何故，如果我想在使用按钮[清除]清除前一个客户的数据后为下一个客户输入，当我单击[收据]按钮再次收据面板上的输出只是显示我在 isSelected() block 之外编写的 toString 语句。我应该做什么来恢复错误(因为我认为它被视为无法显示的错误下一个输出)
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.text.*;
import java.text.DecimalFormat;
import javax.swing.border.*;
import java.awt.GridLayout;
import java.awt.FlowLayout;
import java.awt.BorderLayout;
import javax.swing.BoxLayout;
public class TestP extends JFrame implements ActionListener
{
//var for UPSR
private JTextField txtUh1, txtUh2, txtUh3, txtUh4, txtUh5,txtUt1, txtUt2, txtUt3, txtUt4, txtUt5,txtTot;
private JLabel lblU1, lblU2, lblU3;
private JCheckBox cbUbm1,cbUbm2, cbUbi,cbUmath,cbUsc;
//var for PT3
private JTextField txtPhbm,txtPhbi,txtPhm3,txtPhsc,txtPhag,txtPhsj,txtPhkh;
private JTextField txtPtbm,txtPtbi,txtPtm3,txtPtsc,txtPtag,txtPtsj,txtPtkh;
private JCheckBox cbPbm,cbPbi,cbPm3,cbPsc,cbPag,cbPsj,cbPkh;
private JLabel lblP4,lblP5,lblP6; // lblP1,lblP2,lblP3,lblP7,lblP8,lblP9
private JTextField txtname,txtage,txtcontact;
private JLabel lblname,lblage,lblcontact;
//var for SPM
private JTextField txtSprice, txtShbm, txtShbi, txtShsc, txtShag, txtShm3, txtShac, txtShpd, txtShaddm3, txtShcm, txtShbio, txtShfz, txtShsej, txtStbm, txtStbi, txtStsc, txtStag, txtStm3, txtStac, txtStpd, txtStaddm3, txtStcm, txtStbio, txtStfz, txtStsej;
private JLabel lblS1, lblS2, lblS3, lblS4;
private JCheckBox cbSbm, cbSbi, cbSsc, cbSag, cbSm3, cbSac, cbSpd, cbSaddm3, cbScm, cbSbio, cbSfz, cbSsej;
private JRadioButton rbUpsr,rbPt3,rbSpm;
private JButton btnReceipt = new JButton("RECEIPT");
private JButton btnClear = new JButton("CLEAR");
private JButton btnExit = new JButton("EXIT");
//button group for level
private ButtonGroup rbGroup = new ButtonGroup();
//Text Area for calculation
private JTextArea txtReceipt = new JTextArea("Super Tuition Center Sdn Bhd\t\t" + "\n");
//layout fixed size
private static final int width = 1350;
private static final int height = 730;
Container pane = getContentPane();
Color c = new Color(217, 161, 63);
public TestP()
{
rbUpsr = new JRadioButton("UPSR");
rbPt3 = new JRadioButton("PT-3");
rbSpm = new JRadioButton("SPM");
lblU1 = new JLabel("SUBJECT");
lblU2 = new JLabel("HOUR/WEEK");
lblU3 = new JLabel("TIME/WEEK");
txtUh1 = new JTextField(10);
txtUh2 = new JTextField(10);
txtUh3 = new JTextField(10);
txtUh4 = new JTextField(10);
txtUh5 = new JTextField(10);
txtUt1 = new JTextField(10);
txtUt2 = new JTextField(10);
txtUt3 = new JTextField(10);
txtUt4 = new JTextField(10);
txtUt5 = new JTextField(10);
txtTot = new JTextField(10);
cbUbm1 = new JCheckBox("BAHASA MELAYU PEMAHAMAN");
cbUbm2 = new JCheckBox("BAHASA MELAYU PENULISAN");
cbUbi = new JCheckBox("BAHASA INGGERIS");
cbUmath = new JCheckBox("MATEMATIK");
cbUsc = new JCheckBox("SAINS");
txtPhbm=new JTextField(10);
txtPhbi=new JTextField(10);
txtPhm3=new JTextField(10);
txtPhsc=new JTextField(10);
txtPhag=new JTextField(10);
txtPhsj=new JTextField(10);
txtPhkh=new JTextField(10);
txtPtbm=new JTextField(10);
txtPtbi=new JTextField(10);
txtPtm3=new JTextField(10);
txtPtsc=new JTextField(10);
txtPtag=new JTextField(10);
txtPtsj=new JTextField(10);
txtPtkh=new JTextField(10);
lblP4=new JLabel("SUBJECT ");
lblP5=new JLabel("HOUR/WEEK");
lblP6=new JLabel("TIME/WEEK");
cbPbm=new JCheckBox("BAHASA MELAYU :");
cbPbi=new JCheckBox("BAHASA INGGERIS :");
cbPm3=new JCheckBox("MATEMATIK :");
cbPsc=new JCheckBox("SAINS :");
cbPag=new JCheckBox("PENDIDIKAN ISLAM :");
cbPsj=new JCheckBox("SEJARAH :");
cbPkh=new JCheckBox("KEMAHIRAN HIDUP :");
lblS1 = new JLabel("SUBJECT ");
lblS2 = new JLabel("HOUR/WEEK");
lblS3 = new JLabel("TIME/WEEK");
txtShbm = new JTextField(10);
txtShbi = new JTextField(10);
txtShsc = new JTextField(10);
txtShag = new JTextField(10);
txtShm3 = new JTextField(10);
txtShac = new JTextField(10);
txtShpd = new JTextField(10);
txtShaddm3 = new JTextField(10);
txtShcm = new JTextField(10);
txtShbio = new JTextField(10);
txtShfz = new JTextField(10);
txtShsej = new JTextField(10);
txtSprice = new JTextField(10);
txtStbm = new JTextField(10);
txtStbi = new JTextField(10);
txtStsc = new JTextField(10);
txtStag = new JTextField(10);
txtStm3 = new JTextField(10);
txtStac = new JTextField(10);
txtStpd = new JTextField(10);
txtStaddm3 = new JTextField(10);
txtStcm = new JTextField(10);
txtStbio = new JTextField(10);
txtStfz = new JTextField(10);
txtStsej = new JTextField(10);
lblname=new JLabel("NAME : ");
lblage=new JLabel("AGE : ");
lblcontact=new JLabel("CONTACT NO : ");
txtname=new JTextField(30);
txtage=new JTextField(5);
txtcontact=new JTextField(15);
cbSbm = new JCheckBox("BAHASA MELAYU");
cbSbi = new JCheckBox("BAHASA INGGERIS");
cbSsc = new JCheckBox("SAINS");
cbSag = new JCheckBox("PENDIDIKAN ISLAM");
cbSm3 = new JCheckBox("MATEMATIK");
cbSac = new JCheckBox("AKAUN");
cbSpd = new JCheckBox("PERDAGANGAN");
cbSaddm3 = new JCheckBox("MATEMATIK TAMBAHAN");
cbScm = new JCheckBox("KIMIA");
cbSbio = new JCheckBox("BIOLOGI");
cbSfz = new JCheckBox("FIZIK");
cbSsej = new JCheckBox("SEJARAH");
//setting for main panel
setTitle("Super Tuition");
setSize(width, height);
setVisible(true);
setDefaultCloseOperation(EXIT_ON_CLOSE);
JPanel p1 = new JPanel();
p1.setLayout(new GridLayout(7,3));
p1.setBorder(new TitledBorder("UPSR"));
p1.setBackground(Color.pink);
//p1.setSize(400,400);
p1.add(lblU1);
lblU1.setForeground(Color.BLACK);
p1.add(lblU2);
lblU2.setForeground(Color.BLACK);
p1.add(lblU3);
lblU3.setForeground(Color.BLACK);
p1.add(cbUbm1);
cbUbm1.setBackground(Color.YELLOW);
p1.add(txtUh1);
p1.add(txtUt1);
p1.add(cbUbm2);
cbUbm2.setBackground(Color.YELLOW);
p1.add(txtUh2);
p1.add(txtUt2);
p1.add(cbUbi);
cbUbi.setBackground(Color.YELLOW);
p1.add(txtUh3);
p1.add(txtUt3);
p1.add(cbUmath);
cbUmath.setBackground(Color.YELLOW);
p1.add(txtUh4);
p1.add(txtUt4);
p1.add(cbUsc);
cbUsc.setBackground(Color.YELLOW);
p1.add(txtUh5);
p1.add(txtUt5);
//add components for PT-3
JPanel p2 = new JPanel();
p2.setLayout(new GridLayout(11,3));
p2.setBorder(new TitledBorder("PT-3"));
p2.setBackground(Color.PINK);
p2.setSize(400,400);
p2.add(lblP4);
lblP4.setForeground(Color.BLACK);
p2.add(lblP5);
p2.add(lblP6);
p2.add(cbPbm);
cbPbm.setBackground(Color.YELLOW);
p2.add(txtPhbm);
p2.add(txtPtbm);
p2.add(cbPbi);
cbPbi.setBackground(Color.YELLOW);
p2.add(txtPhbi);
p2.add(txtPtbi);
p2.add(cbPm3);
cbPm3.setBackground(Color.YELLOW);
p2.add(txtPhm3);
p2.add(txtPtm3);
p2.add(cbPsc);
cbPsc.setBackground(Color.YELLOW);
p2.add(txtPhsc);
p2.add(txtPtsc);
p2.add(cbPag);
cbPag.setBackground(Color.YELLOW);
p2.add(txtPhag);
p2.add(txtPtag);
p2.add(cbPsj);
cbPsj.setBackground(Color.YELLOW);
p2.add(txtPhsj);
p2.add(txtPtsj);
p2.add(cbPkh);
cbPkh.setBackground(Color.YELLOW);
p2.add(txtPhkh);
p2.add(txtPtkh);
//add components for SPM
JPanel p3 = new JPanel();
p3.setLayout(new GridLayout(15,3));
p3.setBorder(new TitledBorder("SPM"));
p3.setBackground(Color.PINK);
p3.add(lblS1);
lblS1.setForeground(Color.BLACK);
p3.add(lblS2);
lblS1.setForeground(Color.BLACK);
p3.add(lblS3);
lblS1.setForeground(Color.BLACK);
p3.add(cbSbm);
cbSbm.setBackground(Color.YELLOW);
p3.add(txtShbm);
p3.add(txtStbm);
p3.add(cbSbi);
cbSbi.setBackground(Color.YELLOW);
p3.add(txtShbi);
p3.add(txtStbi);
p3.add(cbSsej);
cbSsej.setBackground(Color.YELLOW);
p3.add(txtShsej);
p3.add(txtStsej);
p3.add(cbSag);
cbSag.setBackground(Color.YELLOW);
p3.add(txtShag);
p3.add(txtStag);
p3.add(cbSm3);
cbSm3.setBackground(Color.YELLOW);
p3.add(txtShm3);
p3.add(txtStm3);
p3.add(cbSaddm3);
cbSaddm3.setBackground(Color.YELLOW);
p3.add(txtShaddm3);
p3.add(txtStaddm3);
p3.add(cbSsc);
cbSsc.setBackground(Color.YELLOW);
p3.add(txtShsc);
p3.add(txtStsc);
p3.add(cbScm);
cbScm.setBackground(Color.YELLOW);
p3.add(txtShcm);
p3.add(txtStcm);
p3.add(cbSfz);
cbSfz.setBackground(Color.YELLOW);
p3.add(txtShfz);
p3.add(txtStfz);
p3.add(cbSbio);
cbSbio.setBackground(Color.YELLOW);
p3.add(txtShbio);
p3.add(txtStbio);
p3.add(cbSac);
cbSac.setBackground(Color.YELLOW);
p3.add(txtShac);
p3.add(txtStac);
p3.add(cbSpd);
cbSpd.setBackground(Color.YELLOW);
p3.add(txtShpd);
p3.add(txtStpd);
//add components for Button Panel
JPanel p4 = new JPanel();
p4.setLayout(new GridLayout(11,3));
p4.setBorder(new TitledBorder("RECEIPT"));
p4.setBackground(Color.red);
//add components for Main panel
JPanel p5 = new JPanel();
setBackground(Color.orange);
p5.add(lblname);
p5.add(txtname);
p5.add(lblage);
p5.add(txtage);
p5.add(lblcontact);
p5.add(txtcontact);
p5.add(btnReceipt);
btnReceipt.addActionListener(this);
p5.add(btnClear);
btnClear.addActionListener(this);
p5.add(btnExit);
btnExit.addActionListener(this);
p5.setBackground(Color.ORANGE);
rbGroup.add(rbUpsr);
p5.add(rbUpsr);
rbUpsr.setBackground(Color.ORANGE);
rbUpsr.addActionListener(this);
rbGroup.add(rbPt3);
p5.add(rbPt3);
rbPt3.setBackground(Color.ORANGE);
rbPt3.addActionListener(this);
rbGroup.add(rbSpm);
p5.add(rbSpm);
rbSpm.setBackground(Color.ORANGE);
rbSpm.addActionListener(this);
JPanel receipt = new JPanel();
receipt.setBorder( new TitledBorder("TOTAL PAYMENT RECEIPT"));
receipt.setBackground(Color.pink);
receipt.add(txtReceipt);
txtReceipt.setFont(new Font("Serif", Font.BOLD, 13));
//end panel receipt
pane.setLayout(new BorderLayout());
pane.add(p1,"South");
pane.add(p2,"Center");
pane.add(p3,"West");
pane.add(p5,"North");
pane.add(receipt,"East"); // end outermost panel
}
public void actionPerformed(ActionEvent event)
{
if (event.getSource() == btnReceipt)
{
double totD=0.0,totalS=0.0,totalU=0.0,totalP=0.0;
DecimalFormat df = new DecimalFormat("0.00");
double totP=0.0;
txtReceipt.append("\n");
txtReceipt.append("\t\tWELCOME TO SUPER TUITION CENTER SDN BHD" + "\n");
txtReceipt.append("\n");
txtReceipt.append("CUSTOMER'S NAME:" +txtname.getText()+"\n");
txtReceipt.append("AGE\t :" +txtage.getText()+"\n");
txtReceipt.append("CONTACT NO :" +txtcontact.getText()+"\n");
txtReceipt.append("\n");
txtReceipt.append("SUBJECTS : " + "\t\t PRICE"+ "\tHOUR"+ "\tTIME" + "\tTOTAL" + "\n");
txtReceipt.append("\n");
if(rbUpsr.isSelected()){
int countU=0;
double totbm1=0.0,totbm2=0.0,totbi=0.0,totmath=0.0,totsc=0.0;
if (cbUbm1.isSelected())
{
int hrbm1 = Integer.parseInt(txtUh1.getText());
int tmbm1 = Integer.parseInt(txtUt1.getText());
totbm1=20*hrbm1*tmbm1;
countU++;
txtReceipt.append("BAHASA MELAYU PEMAHAMAN " + "\tRM 20.00" + "\t" + hrbm1 + "\t"+tmbm1+"\t"+ df.format( totbm1) + "\n"); // set to text area
}
if (cbUbm2.isSelected())
{
int hrbm2 = Integer.parseInt(txtUh2.getText());
int tmbm2 = Integer.parseInt(txtUt2.getText());
totbm2=20*hrbm2*tmbm2;
countU++;
txtReceipt.append("BAHASA MELAYU PENULISAN " + "\tRM 20.00" + "\t" + hrbm2 + "\t" +tmbm2+"\t"+ df.format( totbm2) + "\n"); // set to text area
}
if (cbUbi.isSelected())
{
int hrbi = Integer.parseInt(txtUh3.getText());
int tmbi = Integer.parseInt(txtUt3.getText());
totbi=20*hrbi*tmbi;
countU++;
txtReceipt.append("BAHASA INGGERIS " + "\t\tRM 20.00" + "\t" + hrbi + "\t" +tmbi+"\t"+ df.format( totbi) + "\n"); // set to text area
}
if (cbUmath.isSelected())
{
int hrmath = Integer.parseInt(txtUh4.getText());
int tmmath= Integer.parseInt(txtUt4.getText());
totmath=20*hrmath*tmmath;
countU++;
txtReceipt.append("MATEMATIK " + "\t\tRM 20.00" +"\t"+ hrmath + "\t" +tmmath+"\t"+ df.format( totmath) + "\n"); // set to text area
}
if (cbUsc.isSelected())
{
int hrsc = Integer.parseInt(txtUh5.getText());
int tmsc = Integer.parseInt(txtUt5.getText());
totsc=20*hrsc*tmsc;
txtReceipt.append("SAINS " + "\t\tRM 20.00" +"\t" + hrsc + "\t" +tmsc+"\t"+ df.format( totsc) + "\n"); // set to text area
countU++;
}
totalU=totbm1+totbm2+totbi+totmath+totsc;
if(countU>5){
totD=totalU*0.1;
totP=totalU-totD;
}
else{
totP=totalU;
}
txtReceipt.append("TOTAL FEES : " + "\t\t" + "RM" +totalU+"0" + "\n");
}
if(rbPt3.isSelected()){
double pbm=0.0,pbi=0.0,pm3=0.0,psc=0.0,pag=0.0,psj=0.0,pkh=0.0;
int countP=0;
if(cbPbm.isSelected())
{ int textPhbm=Integer.parseInt(txtPhbm.getText());
int textPtbm=Integer.parseInt(txtPtbm.getText());
pbm=35*textPhbm*textPtbm;
countP++;
txtReceipt.append("BAHASA MELAYU " + "\t\tRM 35.00" + "\t " + textPhbm + "\t " +textPtbm+ "\t "+df.format(pbm) + "\n"); // set to text area
}
if(cbPbi.isSelected())
{ int textPhbi=Integer.parseInt(txtPhbi.getText());
int textPtbi=Integer.parseInt(txtPtbi.getText());
pbi=35*textPhbi*textPtbi;
countP++;
txtReceipt.append("BAHASA INGGERIS " + "\t\tRM 35.00" + "\t " + textPhbi + "\t " +textPtbi+"\t "+ df.format(pbi) + "\n"); // set to text area
}
if(cbPm3.isSelected())
{ int textPhm3=Integer.parseInt(txtPhm3.getText());
int textPtm3=Integer.parseInt(txtPtm3.getText());
pm3=35*textPhm3*textPtm3;
countP++;
txtReceipt.append("MATEMATIK " + "\t\tRM 35.00" + "\t " + textPhm3 + "\t " +textPtm3+"\t "+ df.format(pm3) + "\n"); // set to text area
}
if(cbPsc.isSelected())
{ int textPhsc=Integer.parseInt(txtPhsc.getText());
int textPtsc=Integer.parseInt(txtPtsc.getText());
psc=35*textPhsc*textPtsc;
countP++;
txtReceipt.append("SAINS " + "\t\tRM 35.00" + "\t " + textPhsc + "\t " +textPtsc+ "\t "+ df.format(psc) + "\n"); // set to text area
}
if(cbPag.isSelected())
{ int textPhag=Integer.parseInt(txtPhag.getText());
int textPtag=Integer.parseInt(txtPtag.getText());
pag=35*textPhag*textPtag;
countP++;
txtReceipt.append("PENDIDIKAN ISLAM " + "\t\tRM 35.00" + "\t " + textPhag + "\t " +textPtag+ "\t "+ df.format(pag) + "\n"); // set to text area
}
if(cbPsj.isSelected())
{ int textPhsj=Integer.parseInt(txtPhsj.getText());
int textPtsj=Integer.parseInt(txtPtsj.getText());
psj=35*textPhsj*textPtsj;
countP++;
txtReceipt.append("SEJARAH " + "\t\tRM 35.00" + "\t " + textPhsj + "\t " +textPtsj+ "\t "+ df.format(psj) + "\n"); // set to text area
}
if(cbPkh.isSelected())
{ int textPhkh=Integer.parseInt(txtPhkh.getText());
int textPtkh=Integer.parseInt(txtPtkh.getText());
pkh=35*textPhkh*textPtkh;
countP++;
txtReceipt.append("KEMAHIRAN HIDUP " + "\t\tRM 35.00" + "\t " + textPhkh + "\t " +textPtkh+ "\t "+ df.format(pkh) + "\n"); // set to text area
}
totalP=pbm+pbi+pm3+psc+pag+psj+pkh;
if(countP>=6)
{
totD=totalP*0.1;
totP=totalP-totD;
}
else{
totP=totalP;
}
txtReceipt.append("TOTAL FEES : " + "\t\t" + "RM" +totalP +"0"+ "\n");
}
if(rbSpm.isSelected()){
double bm=0.0, bi=0.0, ag=0.0, sej=0.0, m3=0.0, addm3=0.0, sc=0.0, cm=0.0, bio=0.0, fz=0.0, ac=0.0, pd=0.0;
int countS = 0;
if(cbSbm.isSelected())
{
int hbm = Integer.parseInt(txtShbm.getText());
int tbm = Integer.parseInt(txtStbm.getText());
bm = 50*hbm*tbm;
countS++;
txtReceipt.append("BAHASA MELAYU " + "\t\tRM 50.00" + "\t " + hbm + "\t " +tbm+ "\t "+ df.format(bm) + "\n"); // set to text area
}
if(cbSbi.isSelected())
{
int hbi = Integer.parseInt(txtShbi.getText());
int tbi = Integer.parseInt(txtStbi.getText());
bi = 50*hbi*tbi;
countS++;
txtReceipt.append("BAHASA INGGERIS " + "\t\tRM 50.00" + "\t " + hbi + "\t " +tbi+"\t "+ df.format(bi) + "\n"); // set to text area
}
if(cbSag.isSelected())
{
int hag = Integer.parseInt(txtShag.getText());
int tag = Integer.parseInt(txtStag.getText());
ag = 50*hag*tag;
countS++;
txtReceipt.append("PENDIDIKAN ISLAM " + "\t\tRM 50.00" + "\t " + hag + "\t " +tag+"\t "+ df.format(ag) + "\n"); // set to text area
}
if(cbSsej.isSelected())
{
int hsej = Integer.parseInt(txtShsej.getText());
int tsej = Integer.parseInt(txtStsej.getText());
sej = 50*hsej*tsej;
countS++;
txtReceipt.append("SEJARAH " + "\t\tRM 50.00" + "\t " + hsej + "\t " +tsej+"\t "+ df.format(sej) + "\n"); // set to text area
}
if(cbSm3.isSelected())
{
int hm3 = Integer.parseInt(txtShm3.getText());
int tm3 = Integer.parseInt(txtStm3.getText());
m3 = 50*hm3*tm3;
countS++;
txtReceipt.append("MATEMATIK " + "\t\tRM 50.00" + "\t " + hm3 + "\t " +tm3+"\t "+ df.format(m3) + "\n"); // set to text area
}
if(cbSaddm3.isSelected())
{
int haddm3 = Integer.parseInt(txtShaddm3.getText());
int taddm3 = Integer.parseInt(txtStaddm3.getText());
addm3 = 50*haddm3*taddm3;
countS++;
txtReceipt.append("MATEMATIK TAMBAHAN " + "\t\tRM 50.00" + "\t " + haddm3 + "\t " +taddm3+"\t "+ df.format(addm3) + "\n"); // set to text area
}
if(cbSsc.isSelected())
{
int hsc = Integer.parseInt(txtShsc.getText());
int tsc = Integer.parseInt(txtStsc.getText());
sc = 50*hsc*tsc;
countS++;
txtReceipt.append("SAINS " + "\t\t\tRM 50.00" + "\t " + hsc + "\t " +tsc+ "\t "+ df.format(sc) + "\n"); // set to text area
}
if(cbScm.isSelected())
{
int hcm = Integer.parseInt(txtShcm.getText());
int tcm = Integer.parseInt(txtStcm.getText());
cm = 50*hcm*tcm;
countS++;
txtReceipt.append("KIMIA " + "\t\t\tRM 50.00" + "\t " + hcm + "\t " +tcm+ "\t "+ df.format( cm) + "\n"); // set to text area
}
if(cbSbio.isSelected())
{
int hbio = Integer.parseInt(txtShbio.getText());
int tbio = Integer.parseInt(txtStbio.getText());
bio = 50*hbio*tbio;
countS++;
txtReceipt.append("BIOLOGI" + "\t\t\tRM 50.00" + "\t " + hbio + "\t " +tbio+ "\t "+ df.format( bio) + "\n"); // set to text area
}
if(cbSfz.isSelected())
{
int hfz = Integer.parseInt(txtShfz.getText());
int tfz = Integer.parseInt(txtStfz.getText());
fz = 50*hfz*tfz;
countS++;
txtReceipt.append("FIZIK " + "\t\t\tRM 50.00" + "\t " + hfz + "\t " +tfz+ "\t "+ df.format( fz) + "\n"); // set to text area
}
if(cbSac.isSelected())
{
int hac = Integer.parseInt(txtShac.getText());
int tac = Integer.parseInt(txtStac.getText());
ac = 50*hac*tac;
countS++;
txtReceipt.append("AKAUN " + "\t\t\tRM 50.00" + "\t " + hac + "\t " +tac+ "\t "+ df.format(ac) + "\n"); // set to text area
}
if(cbSpd.isSelected())
{
int hpd = Integer.parseInt(txtShpd.getText());
int tpd = Integer.parseInt(txtStpd.getText());
pd = 50*hpd*tpd;
countS++;
txtReceipt.append("PERDAGANGAN" + "\t\tRM 50.00" + "\t " + hpd + "\t " +tpd+ "\t "+ df.format( pd) + "\n"); // set to text area
}
totalS = bm + bi + ag + sej + m3 + addm3 + sc + cm + fz + ac + pd;
if(countS >= 6)
{
totD=totalS*0.1;
totP=totalS-totD;
}
else{
totP=totalS;
}
txtReceipt.append("TOTAL FEES : " + "\t\t" + "RM" +totP+"0"+ "\n");
}
txtReceipt.append("\n");
txtReceipt.append("TOTAL DISCOUNT : " + "\t\t" + "RM " +totD +"0"+ "\n");
txtReceipt.append("TOTAL PAYMENT PER MONTH : " + "\t" + "RM" +(totP*4)+"0" + "\n");//txtTot.getText()
txtReceipt.append("\n");
txtReceipt.append("\t THANK YOU FOR CHOOSING SUPER TUITION SDN BHD" + "\n");
txtReceipt.append("\n"); // set to text area
}
if (event.getSource() == btnClear)
{
cbUbm1.setSelected(false);
cbUbm2.setSelected(false);
cbUbi.setSelected(false);
cbUmath.setSelected(false);
cbUsc.setSelected(false);
txtUh1.setText(" ");
txtUh2.setText(" ");
txtUh3.setText(" ");
txtUh4.setText(" ");
txtUh5.setText(" ");
txtUt1.setText(" ");
txtUt2.setText(" ");
txtUt3.setText(" ");
txtUt4.setText(" ");
txtUt5.setText(" ");
txtPhbm.setText(" ");
txtPhbi.setText(" ");
txtPhm3.setText(" ");
txtPhsc.setText(" ");
txtPhag.setText(" ");
txtPhsj.setText(" ");
txtPhkh.setText(" ");
txtPtbm.setText(" ");
txtPtbi.setText(" ");
txtPtm3.setText(" ");
txtPtsc.setText(" ");
txtPtag.setText(" ");
txtPtsj.setText(" ");
txtPtkh.setText(" ");
cbPbm.setSelected(false);
cbPbi.setSelected(false);
cbPm3.setSelected(false);
cbPsc.setSelected(false);
cbPag.setSelected(false);
cbPsj.setSelected(false);
cbPkh.setSelected(false);
txtShbm.setText(" ");
txtShbi.setText(" ");
txtShsc.setText(" ");
txtShag.setText(" ");
txtShm3.setText(" ");
txtShac.setText(" ");
txtShpd.setText(" ");
txtShaddm3.setText(" ");
txtShcm.setText(" ");
txtShbio.setText(" ");
txtShfz.setText(" ");
txtShsej.setText(" ");
txtStbm.setText(" ");
txtStbi.setText(" ");
txtStsc.setText(" ");
txtStag.setText(" ");
txtStm3.setText(" ");
txtStac.setText(" ");
txtStpd.setText(" ");
txtStaddm3.setText(" ");
txtStcm.setText(" ");
txtStbio.setText(" ");
txtStfz.setText(" ");
txtStsej.setText(" ");
cbSbm.setSelected(false);
cbSbi.setSelected(false);
cbSsc.setSelected(false);
cbSag.setSelected(false);
cbSm3.setSelected(false);
cbSac.setSelected(false);
cbSpd.setSelected(false);
cbSaddm3.setSelected(false);
cbScm.setSelected(false);
cbSbio.setSelected(false);
cbSfz.setSelected(false);
cbSsej.setSelected(false);
txtname.setText(" ");
txtage.setText(" ");
txtcontact.setText(" ");
rbUpsr.setSelected(false);
rbPt3.setSelected(false);
rbSpm.setSelected(false);
txtReceipt.setText("\t WELCOME TO SUPER TUITION SDN BHD\t\t" + "\n"); //clearing all data that are available
}
if (event.getSource() == btnExit)
{
System.exit(0); //exit the program
}
}
public static void main(String [] args)
{
TestP t = new TestP(); //main application
t.setVisible(true);
t.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
最佳答案
您将看到从 JTextField 返回的 toString()。切勿尝试打印文本字段，仅打印其文本，这是通过调用 toString() 获得的。
这里:
txtReceipt.append("TOTAL PAYMENT" + "\t\t\t" + " RM" + txtTot + "\n");
您正在打印 JTextField、txtTot，而不是它包含的文本。不要这样做。而是这样做:
txtReceipt.append("TOTAL PAYMENT" + "\t\t\t" + " RM" + txtTot.getText() + "\n");
对于您可能尝试打印的所有其他 JTextField 也类似。
还有
- 虽然 null 布局和 setBounds() 对于 Swing 新手来说似乎是创建复杂 GUI 的最简单、最好的方法，但创建的 Swing GUI 越多，使用它们时遇到的困难就越严重。当 GUI 调整大小时，它们不会调整组件的大小，它们是增强或维护的皇家女巫，当放置在滚动 Pane 中时，它们会完全失败，在所有平台或与原始分辨率不同的屏幕分辨率上查看时，它们看起来非常糟糕.
- 你似乎有一个巨大的“上帝”类，一个试图做所有事情的类，这不好，因为这会导致代码困惑和复杂。最好创建多个较小的类，每个类都有自己的单一职责，每个类都可以单独测试和调试。
关于java - 单击“清除”按钮后第二次尝试输入数据无法生成输出(Java GUI)，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/33454401/