用java语言设计一个中英文释义查询程序。输入英文单词，查询数据库将对应的中文显示在下框中；输入中文，查询数据库将对应的英文单词显示在下框中。

以下是一个简单的用Java语言设计的中英文释义查询程序的示例代码：

import java.sql.*;

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

public class DictionaryApp extends JFrame implements ActionListener {
    
    private JLabel wordLabel;
    private JTextField wordField;
    private JButton searchButton;
    private JTextArea resultArea;
    
    private Connection conn;
    private PreparedStatement queryEnglishStmt;
    private PreparedStatement queryChineseStmt;

    public DictionaryApp() {
        super("中英文释义查询程序");
        
        // 创建界面元素
        wordLabel = new JLabel("单词:");
        wordField = new JTextField(20);
        searchButton = new JButton("查询");
        searchButton.addActionListener(this);
        resultArea = new JTextArea(20, 30);
        resultArea.setEditable(false);
        
        // 创建界面布局
        JPanel inputPanel = new JPanel(new FlowLayout());
        inputPanel.add(wordLabel);
        inputPanel.add(wordField);
        inputPanel.add(searchButton);
        JPanel resultPanel = new JPanel(new BorderLayout());
        resultPanel.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
        resultPanel.add(new JScrollPane(resultArea));
        getContentPane().setLayout(new BorderLayout());
        getContentPane().add(inputPanel, BorderLayout.NORTH);
        getContentPane().add(resultPanel, BorderLayout.CENTER);
        
        // 连接数据库
        try {
            Class.forName("com.mysql.jdbc.Driver");
            conn = DriverManager.getConnection("jdbc:mysql://localhost/dictionary", "root", "");
            queryEnglishStmt = conn.prepareStatement("SELECT chinese FROM words WHERE english = ?");
            queryChineseStmt = conn.prepareStatement("SELECT english FROM words WHERE chinese = ?");
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        
        // 设置窗口属性
        setSize(400, 400);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);
    }

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

    @Override
    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == searchButton) {
            String word = wordField.getText().trim();
            if (word.length() == 0) {
                JOptionPane.showMessageDialog(this, "请输入单词或中文！");
                return;
            }
            try {
                if (isEnglish(word)) {
                    queryEnglishStmt.setString(1, word);
                    ResultSet rs = queryEnglishStmt.executeQuery();
                    if (rs.next()) {
                        resultArea.setText(rs.getString(1));
                    } else {
                        resultArea.setText("未找到对应的中文释义！");
                    }
                } else {
                    queryChineseStmt.setString(1, word);
                    ResultSet rs = queryChineseStmt.executeQuery();
                    if (rs.next()) {
                        resultArea.setText(rs.getString(1));
                    } else {
                        resultArea.setText("未找到对应的英文释义！");
                    }
                }
            } catch (SQLException ex) {
                ex.printStackTrace();
            }
        }
    }
    
    private boolean isEnglish(String word) {
        for (int i = 0; i < word.length(); i++) {
            if (word.charAt(i) >= '\u4e00' && word.charAt(i) <= '\u9fa5') {
                return false;
            }
        }
        return true;
    }

}

该程序连接了一个名为dictionary的MySQL数据库，其中包含了一个名为words的表，表结构如下：

CREATE TABLE words (
  id INT(11) NOT NULL AUTO_INCREMENT,
  english VARCHAR(50) NOT NULL,
  chinese VARCHAR(100) NOT NULL,
  PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

程序采用了简单的语言判断方式，如果用户输入的单词中包含了中文字符，则认为用户输入的是中文，否则认为用户输入的是英文。查询时会根据用户输入的语言类型，分别使用不同的SQL语句进行查询，并将查询结果显示在界面的下方文本框中。