从swing组件中读取unicode并在swing组件中显示它失败

时间:2011-09-16 12:16:51

标签: swing unicode

我正在尝试在表中显示unicode字符串,如以下程序中所指定。

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
/**
 *
 * @author dell
 */
public class UnicodeExample extends javax.swing.JFrame {

    /** Creates new form UnicodeExample */
    public UnicodeExample() {
        initComponents();
        setTitle("Unicode Example");
        setSize(400, 400);
        setLocationRelativeTo(null);
    }

    /** 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() {

        jLabel1 = new javax.swing.JLabel();
        jTextField1 = new javax.swing.JTextField();
        jButton1 = new javax.swing.JButton();
        jLabel2 = new javax.swing.JLabel();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        getContentPane().setLayout(null);

        jLabel1.setHorizontalAlignment(javax.swing.SwingConstants.RIGHT);
        jLabel1.setText("Enter :");
        getContentPane().add(jLabel1);
        jLabel1.setBounds(24, 50, 70, 20);

        jTextField1.setText("\\u00a5");
        getContentPane().add(jTextField1);
        jTextField1.setBounds(110, 50, 220, 20);

        jButton1.setText("Display Entered UniCode");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });
        getContentPane().add(jButton1);
        jButton1.setBounds(120, 110, 160, 23);
        getContentPane().add(jLabel2);
        jLabel2.setBounds(120, 170, 150, 40);

        pack();
    }// </editor-fold>

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
        // TODO add your handling code here
        String uniCode = jTextField1.getText();

        jLabel2.setText(uniCode);
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {

            public void run() {
                new UnicodeExample().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify
    private javax.swing.JButton jButton1;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JTextField jTextField1;
    // End of variables declaration
}

但是Unicode字符没有显示。仅当我从外部源获取值作为参数并将该值设置为Swing控件时才会发生这种情况。但是如果我像String unicode="\u00a5"

那样对字符串进行硬编码就没有问题

这个问题有什么问题吗?

1 个答案:

答案 0 :(得分:1)

硬编码有效,因为在这种情况下\u00a5被视为一个单一的unicode字符。

但是,从JTextField获取后,如果您硬编码,则会获得相当于"\u00a5"的STRING "\\u00a5"

更清楚一点,试试

char c = '\u00a5';

System.out.println(c);

编辑:

如果您只在输入框中插入unicode表示,这个小代码可能会有所帮助:

String uniCode = jTextField1.getText();

uniCode = uniCode.substring(2);        
char c = (char) Integer.parseInt(uniCode, 16);                

jLabel2.setText(c + "");

actionPerformed方法中执行此操作。

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