textfile jlabel和jlabel與文本文件相比

所以我正在製作一個關於ATM系統的gui 我想要做的是，當客戶輸入他/她的賬號並釘住程序將在DATABASE.txt中搜索它時當它與來自DATABASE.txt的信息匹配時，程序將自動顯示姓名，帳號，年齡，性別和平衡。但在我的情況下，我得到這個錯誤，我不知道如何解決它。 plzz幫助我。如果你能幫助我，我將不勝感激:)謝謝你，歡呼:)。 ps。我希望你們瞭解我的源代碼T^T。textfile jlabel和jlabel與文本文件相比

一等

import javax.swing.*; 
import java.awt.*; 
import java.awt.event.*; 
import java.io.*; 
import java.util.*; 

public class Xavier1 extends JFrame implements ActionListener,Runnable 
{ 
JButton a[] = new JButton [10]; 
JLabel pin,acc; 
JTextField acc1; 
JButton del,ok,crt; 
int c=0,d=0,e=0; 
JPasswordField pin1; 
JFrame x; 
String us,pw; 

public void run() 
{ 

} 

public Xavier1() 
{ 
    x = new JFrame("ATM"); 
    x.setLayout(null); 
    x.setBounds(400,100,550,500); 
    x.setVisible(true); 

    JPanel x3 = new JPanel(); 
    x.add(x3); 
    x3.setVisible(true); 
    x3.setBounds(150,420,250,100); 
    crt = new JButton("Create Account"); 
    crt.addActionListener(this); 
    x3.add(crt); 

    JPanel x2 = new JPanel(); 
    x.add(x2); 
    x2.setBounds(150,10,250,100); 
    x2.setVisible(true); 
    x2.setLayout(new GridLayout(4,2)); 
    pin = new JLabel("PIN"); 
    acc = new JLabel("ACCOUNT NUMBER"); 
    pin1 = new JPasswordField(20); 
    acc1 = new JTextField(20); 

    x2.add(acc); 
    x2.add(acc1); 
    x2.add(pin); 
    x2.add(pin1); 


    JPanel x1 = new JPanel(); 
    x.add(x1); 
    x1.setBounds(150,200,250,200); 
    x1.setVisible(true); 
    x1.setLayout(new GridLayout(4,3)); 

    for(int b=0;b<10;b++) 
    { 
     a[b] = new JButton(); 
     a[b].setText(Integer.toString(b)); 
     x1.add(a[b]); 
     a[b].addActionListener(this); 
    } 
    ok = new JButton("OK"); 
    ok.addActionListener(this); 
    del = new JButton("DEL"); 
    del.addActionListener(this); 
    x1.add(ok); 
    x1.add(del); 




} 
public static void main (String args[]) 
{ 
    Xavier1 xs = new Xavier1(); 
    Thread xd = new Thread(xs); 
    xd.setDaemon(true); 



} 
public void actionPerformed(ActionEvent z) 
{ 
    Object zz = z.getSource(); 

    if(e == 0) 
    { 
     for(int c=0;c<a.length;c++) 
     { 
      if(zz == a[c]) 
      { 
      acc1.setText(acc1.getText()+a[c].getText()); 
      } 

     } 
    } 
    if(zz == ok) 
    { 
     e++; 
    } 
    if(e==2) 
    { 
     GateKeeper(); 


    } 
    if(e == 1) 
    { 
     for(int d=0;d<a.length;d++) 
     { 
      if(zz == a[d]) 
      { 
      pin1.setText(pin1.getText()+a[d].getText()); 
      } 

     } 

    } 
    if(zz == crt) 
    { 
     Reg rs = new Reg(); 
     Thread sr = new Thread(rs); 
     sr.start(); 
     x.setVisible(false); 
    } 
    if(zz == del) 
    { 
     if(e == 0) 
     { 
      acc1.setText(null); 
     } 
     if(e == 1) 
     { 
      pin1.setText(null); 
     } 
    } 

} 
public void GateKeeper() 
{ 
    try 
    { 
     Scanner sc = new Scanner(new File("DATABASE.txt")); 
     int loop = sc.nextInt(); 
     sc.nextLine(); 
     for(int gk=0;gk<loop;gk++) 
     { 
      String ps[] = sc.nextLine().split(" "); 
      us = ps[0]; 
      pw = ps[1]; 
      if(acc1.getText().equals(us)); 
      { 
       if(pin1.getText().equals(pw)) 
       { 
        Bank b = new Bank(); 
        Thread xb = new Thread(b); 
        xb.start(); 
        x.setVisible(false); 

       } 
      } 

     } 
    } 
    catch(FileNotFoundException s) 
    { 

    } 
} 
}

二等

import javax.swing.*; 
import java.awt.*; 
import java.awt.event.*; 
import java.io.*; 
import java.util.*; 

public class Reg extends Bank 
{ 
JButton res,back,next; 
JFrame r; 

public Reg() 
{ 
    r = new JFrame("REGISTRATION"); 
    r.setVisible(true); 
    x.setVisible(false); 
    r.setBounds(400,100,550,500); 
    r.setLayout(null); 
    X.setVisible(false); 

    n = new JLabel("Name"); 
    age = new JLabel("AGE"); 
    sex = new JLabel("SEX"); 
    dep = new JLabel("DEPOSIT"); 
    accn = new JLabel("ACCOUNT NUMBER"); 
    pins = new JLabel("PIN"); 
    n1 = new JTextField(20); 
    accn1 = new JTextField(20); 
    bal1 = new JTextField(20); 
    sex1 = new JTextField(20); 
    age1 = new JTextField(20); 
    dep1 = new JTextField(20); 
    pins1 = new JPasswordField(20); 

    JPanel r1 = new JPanel(); 
    r.add(r1); 
    r1.setVisible(true); 
    r1.setBounds(50,10,400,400); 

    r1.setLayout(new GridLayout(7,2)); 

    r1.add(accn); 
    r1.add(accn1); 
    r1.add(pins); 
    r1.add(pins1); 
    r1.add(n); 
    r1.add(n1); 
    r1.add(age); 
    r1.add(age1); 
    r1.add(sex); 
    r1.add(sex1); 
    r1.add(dep); 
    r1.add(dep1); 

    JPanel r2 = new JPanel(); 
    r.add(r2); 
    r2.setVisible(true); 
    r2.setBounds(130,400,300,50); 
    r2.setLayout(new GridLayout(0,3)); 
    back = new JButton("BACK"); 
    next = new JButton("NEXT"); 
    res = new JButton("REGISTER!"); 
    res.addActionListener(this); 
    back.addActionListener(this); 
    next.addActionListener(this); 
    r2.add(back); 
    r2.add(res); 
    r2.add(next); 

} 
public void DATABASE() 
{ 
    try 
    { 

    FileWriter fw = new FileWriter("DATABASE.txt",true); 
    PrintWriter pw = new PrintWriter(fw); 

    pw.print(accn1.getText()+" "); 
    pw.print(pins1.getText()+" "); 
    pw.print(n1.getText()+" "); 
    pw.print(age1.getText()+" "); 
    pw.print(sex1.getText()+" "); 
    pw.print(dep1.getText()+" "); 
    pw.println(); 
    pw.close(); 


    } 
    catch(IOException s) 
    { 

    } 
} 
public static void main(String args[]) 
{ 


} 
public void actionPerformed(ActionEvent rg) 
{ 
    Object rz = rg.getSource(); 

    if(rz == res) 
    { 
     DATABASE(); 
    } 
    if(rz == next) 
    { 
     Bank b = new Bank(); 
     Thread xb = new Thread(b); 
     xb.start(); 
     r.setVisible(false); 
    } 
    if(rz == back) 
    { 
     Xavier1 xs = new Xavier1(); 
     Thread xd = new Thread(xs); 
     xd.start(); 
     r.setVisible(false); 
    } 

} 
}

第三類

import javax.swing.*; 
import java.awt.*; 
import java.awt.event.*; 
import java.io.*; 
import java.util.*; 

public class Bank extends Xavier1 
{ 


JLabel n,accn,bal,age,sex,dep,pins; 
JFrame X,r; 
JTextField n1,accn1,bal1,sex1,age1,dep1; 
JPasswordField pins1; 
JLabel Xn,Xacc,Xbal,Xage,Xsex; 
String xn,xacc,xbal,xage,xsex; 

public void reader() 
{ 
    try 
    { 
    FileReader fr = new FileReader("DATABASE.TXT"); 
    BufferedReader br = new BufferedReader(fr); 
    } 
    catch(FileNotFoundException s) 
    { 

    } 
} 


public Bank() 
{ 
    X = new JFrame("BANK"); 
    X.setVisible(true); 
    X.setBounds(400,100,550,500); 
    X.setLayout(null); 
    x.setVisible(false); 


    JPanel info = new JPanel(); 
    X.add(info); 
    info.setVisible(true); 
    info.setBounds(50,10,400,400); 
    info.setLayout(new GridLayout(7,2)); 

    try 
    { 
     Scanner s2 = new Scanner(new File("DATABASE.txt")); 
     int loop2 = s2.nextInt(); 
     for(int gkz=0;gkz<loop2;gkz++) 
     { 
      String info2[]= s2.nextLine().split(" "); 
      xn = info2[2]; 
      xacc = info2[0]; 
      xage = info2[3]; 
      xsex = info2[4]; 
      xbal =info2[5]; 

      if(acc1.getText().equals(us)) 
      { 
       if(pin1.getText().equals(pw)) 
       { 
        JLabel Xn= new JLabel("NAME: "+xn); 
        JLabel Xacc = new JLabel("ACCOUNT NUMBER: "+xacc); 
        JLabel Xage = new JLabel("AGE: "+xage); 
        JLabel Xsex = new JLabel("SEX: "+sex); 
        JLabel Xbal = new JLabel("BALANCE: "+xbal); 

       } 
      } 


     } 
    } 
    catch(FileNotFoundException s) 
    { 

    } 





} 
public static void main(String args[]) 
{ 


} 
public void actionPerformed(ActionEvent z1) 
{ 
    Object z2 = z1.getSource(); 
} 

}

這都是錯誤的，我得到

Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 2 
at Bank.<init>(Bank.java:54) 
at Xavier1.GateKeeper(Xavier1.java:160) 
at Xavier1.actionPerformed(Xavier1.java:108) 
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018) 
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341) 
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402) 
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259) 
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252) 
at java.awt.Component.processMouseEvent(Component.java:6505) 
at javax.swing.JComponent.processMouseEvent(JComponent.java:3321) 
at java.awt.Component.processEvent(Component.java:6270) 
at java.awt.Container.processEvent(Container.java:2229) 
at java.awt.Component.dispatchEventImpl(Component.java:4861) 
at java.awt.Container.dispatchEventImpl(Container.java:2287) 
at java.awt.Component.dispatchEvent(Component.java:4687) 
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832) 
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492) 
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422) 
at java.awt.Container.dispatchEventImpl(Container.java:2273) 
at java.awt.Window.dispatchEventImpl(Window.java:2719) 
at java.awt.Component.dispatchEvent(Component.java:4687) 
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735) 
at java.awt.EventQueue.access$200(EventQueue.java:103) 
at java.awt.EventQueue$3.run(EventQueue.java:694) 
at java.awt.EventQueue$3.run(EventQueue.java:692) 
at java.security.AccessController.doPrivileged(Native Method) 
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76) 
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87) 
at java.awt.EventQueue$4.run(EventQueue.java:708) 
at java.awt.EventQueue$4.run(EventQueue.java:706) 
at java.security.AccessController.doPrivileged(Native Method) 
at  java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76) 
at java.awt.EventQueue.dispatchEvent(EventQueue.java:705) 
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242) 
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161) 
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150) 
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146) 
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138) 
at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)

來源

2014-02-16 Xavier

你得到什麼錯誤？ – user12458

我不知道如何解決它們:(對不起，我仍然是一個新手:(它只是指向GateKeeper，我似乎不知道最新錯誤。btw ty幫助我先生:) – Xavier

java.lang.ArrayIndexOutOfBoundsException: 2 （Bank.java:54）

（Bank.java:54） - xn = info2[2];

這是你的問題。說你的文件是這樣的

3 
data data data data 
data data data data

低於THW第一行代碼將讀取3但掃描儀將留在該行。

int loop2 = s2.nextInt(); 
for(int gkz=0;gkz<loop2;gkz++) 
{ 
    String info2[]= s2.nextLine().split(" ");

所以要nextLine()下一個電話會消耗僅消耗線運輸，將只採取你到下一行，但實際上沒有讀它。所以真的s2.nextLine().split(" ");將返回一個空的數組。所以當你嘗試做info[2]時，你會得到一個ArrayIndexOutOfBoundsException，因爲索引2不存在。

兩種可能的修復方法。

只需撥打s2.nextLine()int loop2 = s2.nextInt();
後個人雖然，我寧願總是由線讀取（而不是nextInt/nextDouble），並解析它，所以我不碰到你的問題。
```
int loop2 = Integer.parseInt(s2.nextLine().trim());  
for(int gkz=0;gkz<loop2;gkz++) { 
    ... 
```

來源

2014-02-16 15:10:44

textfile jlabel和jlabel與文本文件相比

回答

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