我正在读取具有以下格式的文本文件:
Room1*Exposition*Work 1 | Work 2 | Work 3 | Work n
Room2*Exposition*Obra 1 | Work 2 | Work 3 | Work n
使用以下内容:
try {
String path="contenidoDelMuseo.txt";
File myFile = new File (path);
FileReader fileReader = new FileReader(myFile);
BufferedReader reader = new BufferedReader(fileReader);
String line = null;
while ((line=reader.readLine())!=null){
String [] fields = line.split("\\*");
}
每次我尝试访问 fields[1] 时都会抛出 IndexOutOfBoundsException。为什么？
编辑:类的全部代码是
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
/*
* Buscar.java
*
* Created on 23/04/2009, 06:22:54 PM
*/
package interfaces;
import java.io.File;
import java.io.FileReader;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.ArrayList;
/**
*
* @author Alirio
*/
public class Buscar extends javax.swing.JFrame {
static ArrayList<String>obras = new ArrayList<String>();
static ArrayList<String>salas = new ArrayList<String>();
static ArrayList <String> exposiciones = new ArrayList <String>();
/** Creates new form Buscar */
public Buscar() {
initComponents();
try {
String ruta="contenidoDelMuseo.txt";
File myFile = new File (ruta);
FileReader fileReader = new FileReader(myFile);
BufferedReader reader = new BufferedReader(fileReader);
String line = null;
while ((line=reader.readLine())!=null){
System.out.println(line);
String []camposABuscar = line.split("\\*");
salas.add(camposABuscar[0]);
System.out.println(camposABuscar[0]);
System.out.println(camposABuscar[1]);
//System.out.println(camposABuscar[1]);
// exposiciones.add(camposABuscar[1]);
//String []obrasABuscar = camposABuscar[2].split("\\|");
/*
for (int contador =0; contador <obrasABuscar.length; contador++)
{
obras.add(obrasABuscar[contador]);
}*/
//System.out.print(obras.get(0));
}
reader.close();
}
catch (IOException ex){
ex.printStackTrace();
}
}
/** 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() {
jPanel1 = new javax.swing.JPanel();
jPanel2 = new javax.swing.JPanel();
Buscatext = new javax.swing.JTextField();
Criterios = new javax.swing.JComboBox();
Buscar = new javax.swing.JButton();
labelBusqueda = new javax.swing.JLabel();
labelCriterios = new javax.swing.JLabel();
BotonSalir = new javax.swing.JButton();
jLabel1 = new javax.swing.JLabel();
jLabel3 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jPanel1.setLayout(null);
jPanel2.setBackground(new java.awt.Color(255, 153, 0));
jPanel2.setBorder(javax.swing.BorderFactory.createTitledBorder(null, "Buscador", javax.swing.border.TitledBorder.DEFAULT_JUSTIFICATION, javax.swing.border.TitledBorder.DEFAULT_POSITION, new java.awt.Font("Tahoma", 0, 11), new java.awt.Color(255, 255, 255))); // NOI18N
jPanel2.setToolTipText("Hola");
Criterios.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "-Seleccione-", "Autor", "Sala", "Piso", " " }));
Buscar.setText("Buscar");
Buscar.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
BuscarActionPerformed(evt);
}
});
labelBusqueda.setText("Busqueda:");
labelCriterios.setText("Criterios:");
BotonSalir.setText("Salir");
BotonSalir.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
BotonSalirActionPerformed(evt);
}
});
javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
jPanel2.setLayout(jPanel2Layout);
jPanel2Layout.setHorizontalGroup(
jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel2Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(labelBusqueda, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(Buscatext, javax.swing.GroupLayout.DEFAULT_SIZE, 204, Short.MAX_VALUE))
.addGap(63, 63, 63)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel2Layout.createSequentialGroup()
.addComponent(labelCriterios)
.addContainerGap())
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel2Layout.createSequentialGroup()
.addComponent(Criterios, 0, 179, Short.MAX_VALUE)
.addGap(56, 56, 56)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
.addComponent(BotonSalir, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(Buscar, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 136, Short.MAX_VALUE))
.addGap(60, 60, 60))))
);
jPanel2Layout.linkSize(javax.swing.SwingConstants.HORIZONTAL, new java.awt.Component[] {Buscar, Criterios});
jPanel2Layout.setVerticalGroup(
jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel2Layout.createSequentialGroup()
.addGap(20, 20, 20)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(labelBusqueda)
.addComponent(labelCriterios))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(Buscatext, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(Criterios, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(Buscar))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(BotonSalir)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
jPanel2Layout.linkSize(javax.swing.SwingConstants.VERTICAL, new java.awt.Component[] {Buscar, Criterios});
jPanel1.add(jPanel2);
jPanel2.setBounds(20, 180, 720, 130);
jLabel1.setIcon(new javax.swing.ImageIcon(getClass().getResource("/imagenes/LOGOTIPO.jpg"))); // NOI18N
jPanel1.add(jLabel1);
jLabel1.setBounds(10, 10, 250, 150);
jLabel3.setIcon(new javax.swing.ImageIcon(getClass().getResource("/imagenes/fondos/iconoconejo.gif"))); // NOI18N
jLabel3.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
jLabel3MouseClicked(evt);
}
});
jPanel1.add(jLabel3);
jLabel3.setBounds(710, 0, 50, 50);
jLabel2.setIcon(new javax.swing.ImageIcon(getClass().getResource("/imagenes/fondos/background_1.jpg"))); // NOI18N
jLabel2.setText("jLabel2");
jPanel1.add(jLabel2);
jLabel2.setBounds(0, 0, 980, 980);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, 763, javax.swing.GroupLayout.PREFERRED_SIZE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, 619, javax.swing.GroupLayout.PREFERRED_SIZE)
);
pack();
}// </editor-fold>
private void jLabel3MouseClicked(java.awt.event.MouseEvent evt) {
// TODO add your handling code here:
ClaveAdministrador CA= new ClaveAdministrador();
CA.setVisible(true);
}
private void BotonSalirActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
InterfazSeleccion A= new InterfazSeleccion();
A.setVisible(true);
this.setVisible(false);
}
private void BuscarActionPerformed(java.awt.event.ActionEvent evt) {
String s = Buscatext.getText ();
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Buscar().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton BotonSalir;
private javax.swing.JButton Buscar;
private javax.swing.JTextField Buscatext;
private javax.swing.JComboBox Criterios;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JPanel jPanel1;
private javax.swing.JPanel jPanel2;
private javax.swing.JLabel labelBusqueda;
private javax.swing.JLabel labelCriterios;
// End of variables declaration
}
最佳答案
我敢打赌你的文件的第一“行”实际上是空白的，所以你第一次通过循环时拆分什么都不做，因此数组是空的。您可以在尝试使用它之前检查 fields[] 数组的大小，如果它为空(或长度 = 0)则移至下一行。
关于java - split() 方法失败，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/922942/