随机读取文件并在标签中输出

Question

我使用这些代码随机读取文本文件，并向我显示标签中的输出。我不知道我是如何阅读随机文字或线条并将其放入标签中的？ finaly我的目的是阅读随机字进出把这个词在标签

static JLabel lbl; 
JLabel word ; 

a(){  
    ButtonComponent(); 
    OtherParts(); 
    labels();  

    setTitle("HangmanGame"); 
    setSize(840, 310); 
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 

    setLayout(null); 
    setVisible(true); 
    setLocation(320, 150); 
} 

public void labels(){ 
    for(int s=19; s>=8;s--){ 
     word = new JLabel (""); 
     word.setBounds(s*30, 60, 20, 20); 
     add(word);    
    } 

    for (int a = 19; a >= 8; a--) { 
     JLabel lbl = new JLabel("_"); 
     lbl.setBounds(a * 30, 60, 20, 20); 
     add(lbl); 
    } 
} 

public void OtherParts() { 
    JTextField tf = new JTextField(); 
    tf.setBounds(55, 190, 340, 30); 
    add(tf); 

    JButton Guess = new JButton("Guess"); 
    Guess.setBounds(410, 190, 355, 30); 
    add(Guess); 
    JLabel chance = new JLabel ("Remaining Chance"); 
    chance.setBounds(55, 215, 340, 30); 
    add(chance); 

} 

public void ButtonComponent() { 
    for (int i = 65; i < 78; i++) { 
     JButton temp = new JButton("" + (char) i); 
     temp.addActionListener(new BtnListener()); 
     temp.setBounds((i - 64) * 55, 110, 50, 30); 
     add(temp); 
    } 
    for (int i = 78; i < 91; i++) { 
     JButton temp = new JButton("" + (char) i); 
     temp.addActionListener(new BtnListener()); 
     temp.setBounds((i - 77) * 55, 150, 50, 30); 
     add(temp); 
    } 
} 

public void MenuComponent() { 
    JMenuBar menubar = new JMenuBar(); 
    setJMenuBar(menubar); 

    JMenu file = new JMenu("File"); 
    menubar.add(file); 
    JMenuItem newgame = new JMenuItem("New"); 
    JMenuItem savegame = new JMenuItem("Save Game"); 
    JMenuItem Loadgame = new JMenuItem("Load"); 
    JMenuItem exit = new JMenuItem("Exit"); 

    file.add(savegame); 
    file.add(Loadgame); 
    file.add(exit); 
    file.add(newgame); 

    exit.addActionListener(new exitListener()); 
    JMenu option = new JMenu("Option"); 
    menubar.add(option); 
    JMenuItem op = new JMenuItem("Option"); 
    option.add(op); 
} 

class exitListener implements ActionListener { 
    public void actionPerformed(ActionEvent arg0) { 
     System.exit(0); 
    } 
} 

class BtnListener implements ActionListener { 
    public void actionPerformed(ActionEvent e) {  
     JButton clickedButton = (JButton) e.getSource(); 
     String text = clickedButton.getText(); 
     System.out.println(text + lbl);  
     //word.setText(text); 
    } 
} 

public static void main(String[] args) { 
    new a(); 
    Properties readfile = new Properties(); 
    try { 
     readfile.load(new FileInputStream("ciu")); 
    } catch (Exception e) { 
     System.out.println(e.toString()); 
    } 
    for (int i = 1; i <5; i++) { 
     String line = readfile.getProperty("" + i); 
     System.out.println(line); 
    } 
} 

Answer 1

你有很多的不相关的问题代码。 如果你想生成随机数可以使用Random

Random random = new Random(); 
int randomInt = random.nextInt(10);//generate random numbers between 0..10 

我还是不知道你想要的这里，但我希望这有助于

Answer 2

这里是如何从一个文本文件中读取一行 https://stackoverflow.com/a/9181778/1360074

这是你如何设置文本标签：

JLabel label = new JLabel(); 
label.setText(str);