因此，我正在使用搜索算法编写程序。 它编译良好，没有给我一个错误。
这是我的代码，
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import java.awt.Font;
import java.awt.SystemColor;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.Scanner;
import java.util.Vector;
import javax.swing.SwingConstants;
import javax.swing.JTable;
import javax.swing.JScrollPane;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableModel;
import javax.swing.JTextField;
import javax.swing.JButton;
import javax.swing.ImageIcon;
import java.awt.Color;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.Toolkit;
import javax.swing.JComboBox;
import javax.swing.JTextPane;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.print.PrinterException;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableModel;
import javax.swing.GroupLayout.Alignment;
import javax.swing.GroupLayout;
import javax.swing.LayoutStyle.ComponentPlacement;
public class BismillahKasir3 extends javax.swing.JFrame {
private static final Object Datang = null;
private JFrame framekasir3;
private JTable table;
private JTextField tfKODE;
private JTextField tfNAMA;
private JTextField tfSATUAN;
private JTextField tfBANYAK;
private JTextField tfTOTAL;
private JTable tblKERANJANG;
private JTextField TFBAYAR;
private JTextField tfKEMBALI;
private JTextField tfSUM;
LinkedList <String> namaa = new LinkedList<String>();
LinkedList <String> noohp = new LinkedList<String>();
LinkedList <String> kodebuku = new LinkedList<String>();
LinkedList <String> judulbuku = new LinkedList<String>();
static linked buku = new linked();
static node chatta = new node();
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
BismillahKasir3 window = new BismillahKasir3();
window.framekasir3.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the application.
*/
public BismillahKasir3() {
initialize();
}
/**
* Initialize the contents of the frame.
*/
private void initialize() {
framekasir3 = new JFrame();
framekasir3.setUndecorated(true);
framekasir3.setIconImage(Toolkit.getDefaultToolkit().getImage("C:\\Users\\LENOVO\\eclipse-workspace\\2018Etugasakhir\\STATIONARY4.png"));
framekasir3.setTitle("Stationaries CORNER");
framekasir3.setBackground(SystemColor.activeCaption);
framekasir3.getContentPane().setBackground(Color.BLUE);
framekasir3.getContentPane().setFont(new Font("Berlin Sans FB", Font.BOLD, 25));
framekasir3.setBounds(150, 50, 800, 562);
framekasir3.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
framekasir3.getContentPane().setLayout(null);
JButton btnHitung = new JButton("Hitung");
JButton btnBuatNota = new JButton("Buat Nota");
btnBuatNota.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
try {
tblKERANJANG.print();
}
catch(PrinterException e){
e.printStackTrace();
}
}
});
Scanner input = new Scanner(System.in);
buku.tambahakhir("BUKU", "A001", 13000);
buku.tambahakhir("5 cm", "A002", 2000);
buku.tambahakhir("1000 Muslim Mengejar Bintang", "A003", 3000);
buku.tambahakhir("bismillah", "A004", 5000);
JTextPane textPane = new JTextPane();
textPane.setBounds(320, 258, 461, 193);
framekasir3.getContentPane().add(textPane);
btnBuatNota.setFont(new Font("Tahoma", Font.PLAIN, 14));
btnBuatNota.setBounds(438, 520, 104, 29);
framekasir3.getContentPane().add(btnBuatNota);
tfKEMBALI = new JTextField();
tfKEMBALI.setFont(new Font("Tahoma", Font.PLAIN, 14));
tfKEMBALI.setEditable(false);
tfKEMBALI.setBounds(376, 209, 116, 29);
framekasir3.getContentPane().add(tfKEMBALI);
tfKEMBALI.setColumns(10);
JButton btnBayar = new JButton("Bayar");
btnBayar.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
try {
int a, b, kembalian;
a=Integer.parseInt(tfSUM.getText());
b=Integer.parseInt(TFBAYAR.getText());
if(b<a) {
JOptionPane.showMessageDialog(null, "Inputan Salah!!");
TFBAYAR.setText("");
tfKEMBALI.setText("");
}
else {
kembalian = b-a;
tfKEMBALI.setText(Integer.toString(kembalian));
}
}
catch(Exception e1) {
JOptionPane.showMessageDialog(null, "Inputan Salah!!");
tfBANYAK.setText("");
tfTOTAL.setText("");
}
}
});
btnBayar.setFont(new Font("Tahoma", Font.PLAIN, 14));
btnBayar.setBounds(685, 173, 82, 23);
framekasir3.getContentPane().add(btnBayar);
TFBAYAR = new JTextField();
TFBAYAR.setFont(new Font("Tahoma", Font.PLAIN, 14));
TFBAYAR.setBounds(549, 170, 126, 29);
framekasir3.getContentPane().add(TFBAYAR);
TFBAYAR.setColumns(10);
tblKERANJANG = new JTable();
tblKERANJANG.setFont(new Font("Tahoma", Font.PLAIN, 10));
tblKERANJANG.setModel(new DefaultTableModel(
new Object[][] {
{null, null, null},
},
new String[] {
"Barang", "Jumlah", "Total"
}
) {
boolean[] columnEditables = new boolean[] {
false, false, false
};
public boolean isCellEditable(int row, int column) {
return columnEditables[column];
}
});
tblKERANJANG.getColumnModel().getColumn(0).setPreferredWidth(100);
tblKERANJANG.getColumnModel().getColumn(1).setPreferredWidth(15);
tblKERANJANG.getColumnModel().getColumn(2).setPreferredWidth(15);
tblKERANJANG.setShowVerticalLines(false);
tblKERANJANG.setShowHorizontalLines(false);
tblKERANJANG.setShowGrid(false);
tblKERANJANG.setBorder(null);
tblKERANJANG.setBounds(99, 365, 203, 151);
framekasir3.getContentPane().add(tblKERANJANG);
tfKODE = new JTextField();
tfKODE.setFont(new Font("Tahoma", Font.PLAIN, 14));
tfKODE.setBounds(99, 62, 197, 29);
framekasir3.getContentPane().add(tfKODE);
tfKODE.setColumns(10);
linesearch uwu = new linesearch();
JButton btnCari = new JButton("Cari");
btnCari.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
chatta = uwu.search(buku, tfKODE.getText());
if(uwu.indeks ==-1) {
JOptionPane.showMessageDialog(null, "Judul buku dengan kode " +chatta.kode+ " tidak ditemukan");
tfNAMA.setText("");
tfSATUAN.setText("");
}
else {
tfNAMA.setText("" + chatta.judul);
tfSATUAN.setText("" +chatta.harga);
}
}
});
btnCari.setFont(new Font("Tahoma", Font.PLAIN, 14));
btnCari.setBounds(99, 96, 89, 23);
framekasir3.getContentPane().add(btnCari);
JButton btnReset = new JButton("Reset");
btnReset.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
tfKODE.setText("");
tfNAMA.setText("");
tfSATUAN.setText("");
tfBANYAK.setText("");
tfTOTAL.setText("");
}
});
btnReset.setFont(new Font("Tahoma", Font.PLAIN, 14));
btnReset.setBounds(207, 96, 89, 23);
framekasir3.getContentPane().add(btnReset);
tfNAMA = new JTextField();
tfNAMA.setFont(new Font("Tahoma", Font.PLAIN, 10));
tfNAMA.setEditable(false);
tfNAMA.setBounds(99, 129, 197, 29);
framekasir3.getContentPane().add(tfNAMA);
tfNAMA.setColumns(10);
tfSATUAN = new JTextField();
tfSATUAN.setFont(new Font("Tahoma", Font.PLAIN, 14));
tfSATUAN.setEditable(false);
tfSATUAN.setBounds(99, 169, 197, 29);
framekasir3.getContentPane().add(tfSATUAN);
tfSATUAN.setColumns(10);
tfBANYAK = new JTextField();
tfBANYAK.setFont(new Font("Tahoma", Font.PLAIN, 14));
tfBANYAK.setBounds(99, 209, 197, 29);
framekasir3.getContentPane().add(tfBANYAK);
tfBANYAK.setColumns(10);
JButton btnAdd = new JButton("Masuk Keranjang");
btnAdd.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
try {
DefaultTableModel dt = (DefaultTableModel) tblKERANJANG.getModel();
Vector v = new Vector();
v.add(tfNAMA.getText());
v.add(tfBANYAK.getText());
v.add(tfSATUAN.getText());
dt.addRow(v);
}
catch(Exception e1) {
JOptionPane.showMessageDialog(null, "Pilih barang terlebih dahulu!!");
}
}
});
btnAdd.setFont(new Font("Tahoma", Font.PLAIN, 14));
btnAdd.setBounds(124, 325, 150, 29);
framekasir3.getContentPane().add(btnAdd);
tfTOTAL = new JTextField();
tfTOTAL.setFont(new Font("Tahoma", Font.PLAIN, 14));
tfTOTAL.setEditable(false);
tfTOTAL.setBounds(99, 289, 197, 29);
framekasir3.getContentPane().add(tfTOTAL);
tfTOTAL.setColumns(10);
btnHitung.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
try {
int a, b, hasiltotal;
a=Integer.parseInt(tfSATUAN.getText());
b=Integer.parseInt(tfBANYAK.getText());
hasiltotal = a*b;
tfTOTAL.setText(Integer.toString(hasiltotal));
}
catch(Exception e1) {
JOptionPane.showMessageDialog(null, "Inputan Salah!!");
tfBANYAK.setText("");
tfTOTAL.setText("");
}
}
});
btnHitung.setFont(new Font("Tahoma", Font.PLAIN, 14));
btnHitung.setBounds(124, 249, 150, 29);
framekasir3.getContentPane().add(btnHitung);
JButton btnBATAL = new JButton("Batal");
btnBATAL.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
}
});
btnBATAL.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent arg0) {
try {
DefaultTableModel dataModel = (DefaultTableModel) tblKERANJANG.getModel();
if (tblKERANJANG.getRowCount() > 0) {
for (int i = tblKERANJANG.getRowCount() - 1; i > -1; i--) {
dataModel.removeRow(i);
}
tfKODE.setText("");
tfSUM.setText("");
tfNAMA.setText("");
tfSATUAN.setText("");
tfBANYAK.setText("");
tfTOTAL.setText("");
TFBAYAR.setText("");
tfKEMBALI.setText("");
}
}
catch(Exception e1) {
JOptionPane.showMessageDialog(null, "Tidak ada daftar pada keranjang!");
tfKODE.setText("");
tfSUM.setText("");
tfNAMA.setText("");
tfSATUAN.setText("");
tfBANYAK.setText("");
tfTOTAL.setText("");
TFBAYAR.setText("");
tfKEMBALI.setText("");
}
}
});
btnBATAL.setFont(new Font("Tahoma", Font.PLAIN, 14));
btnBATAL.setBounds(114, 527, 89, 23);
framekasir3.getContentPane().add(btnBATAL);
JButton btnX = new JButton("X");
btnX.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
int s= JOptionPane.showConfirmDialog(null, "Apakah anda ingin menutup program? ");
if(s==JOptionPane.YES_OPTION)
{System.exit(0);
}
}
});
btnX.setFont(new Font("Tahoma", Font.PLAIN, 18));
btnX.setBounds(731, 16, 50, 35);
framekasir3.getContentPane().add(btnX);
JButton btnTotal = new JButton("Total");
btnTotal.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btnHitungActionPerformed(evt);
}
});
btnTotal.setFont(new Font("Tahoma", Font.PLAIN, 14));
btnTotal.setBounds(213, 527, 89, 23);
framekasir3.getContentPane().add(btnTotal);
tfSUM = new JTextField();
tfSUM.setFont(new Font("Tahoma", Font.PLAIN, 14));
tfSUM.setEditable(false);
tfSUM.setBounds(366, 170, 126, 29);
framekasir3.getContentPane().add(tfSUM);
tfSUM.setColumns(10);
JLabel label = new JLabel("");
label.setIcon(new ImageIcon("C:\\Users\\LENOVO\\eclipse-workspace\\2018Etugasakhir\\STATIONARY4.png"));
label.setBounds(0, 0, 800, 560);
framekasir3.getContentPane().add(label);
}
private void btnHitungActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btnHitungActionPerformed
// TODO add your handling code here:
int jumlahBaris = tblKERANJANG.getRowCount();
int totalBiaya = 0;
int jumlahBarang, hargaBarang;
TableModel tabelModel;
tabelModel = tblKERANJANG.getModel();
for (int i=1; i<jumlahBaris; i++){
jumlahBarang = Integer.parseInt(tabelModel.getValueAt(i, 1).toString());
hargaBarang = Integer.parseInt(tabelModel.getValueAt(i, 2).toString());
totalBiaya = totalBiaya + (jumlahBarang*hargaBarang);
}
tfSUM.setText(String.valueOf(totalBiaya));
}
}
class node {
String kode;
String judul;
int harga;
node next;
node prev;
}
class linesearch{
int indeks;
public node search(linked b, String kodee){
indeks = -1;
node cari = new node();
cari.kode = kodee;
node ganti = b.head;
for (int i = 0; i< b.ukuran(); i++) {
String smbrng = ganti.kode;
if(kodee.equals(smbrng)) {
indeks = i;
cari.judul = ganti.judul;
cari.harga = ganti.harga;}
ganti = ganti.next;
}
return cari;
}
}
class linked {
node head;
public int ukuran() {
node em = head;
int size = 0;
while (em!= null) {
size = size+1;
em = em.next;}
return size;
}
public node indeks(int a) {
node ma = head;
if (a<ukuran()&& a>= 0) {
for (int i = 0; i<a; i++) {
ma = ma.next;
}
return ma;}
else return null;}
public boolean kosong() {
boolean b = true;
if(ukuran()==0) {
b = true;
}
else
b = false;
return b;
}
public void tambahawal (String a, String b, int c) {
node em = new node();
em.judul = a;
em.kode = b;
em.harga = c;
em.next = head;
em.prev = null;
if(head!=null)
head.prev = em;
head = em;
}
public void tambahakhir (String a, String b, int c) {
node em = new node();
em.judul = a;
em.kode = b;
em.harga = c;
node ganti = head;
if(kosong()) {
tambahawal(a,b,c);
}
else {
while(ganti.next!=null) {
ganti = ganti.next;
ganti.next = em;
em.prev = ganti;
em.next = null;
}
}
}
public void tampil() {
node em = head;
System.out.println("\n" +em.kode + "\t" + em.judul + "\t" + em.harga);
em = em.next;
while(em!= null) {
System.out.println("\n" +em.kode+ "\t" + em.judul + "\t" + em.harga);
em = em.next;
}
}
public void hapusawal() {
if(kosong()) {
}
else {
head = head.next;
head.prev = null;
}
}
public void hapusakhir() {
node em = head;
if(kosong()) {
}
else {
for (int i = 0;i<ukuran()-1; i++) {
em = em.next;
}
em.next.prev = null;
em.next = null;
}
}
public boolean isi(String a) {
boolean c = false;
int b = 0;
node ganti = head;
for(int i = 0; i<ukuran(); i++) {
if(ganti.kode ==a) {
b = b+1;
}
ganti = ganti.next;
}
if(b<0) {
c = true;}
return c;
}
public void hapussemua() {
head = null;
}
}
事实是，当我搜索“ A001”时，结果很好。但是当我搜索“ A002”或“ A003”或“ A004”时，结果不存在（但没有给我一个错误）。
你能帮我吗？ 非常感谢。
