如何在另一个类中调用Java类的变量

Question

如果我有一个准备好语句的类，当用户按下按钮时如何调用它们。

class updateeButtonHandler implements ActionListener 
{ 
    public void actionPerformed(ActionEvent e) 
    { 
     name = displayName.getText(); 
     price = bookPrice.getText(); 
     Queries update = new Queries();??????????????????? 
    } 
} 

在不同类

public int update(String price, String name) throws SQLException { 
     ps2.setString(1, name); 
     ps2.setString(2, price); 
     System.out.print("Update - "); 
     return ps2.executeUpdate(); 
    } 

Answer 1

预处理语句创建一个对象，并调用与参数的更新方法如下所示：

public void actionPerformed(ActionEvent e) { 
     name = displayName.getText(); 
     price = bookPrice.getText(); 
     Queries update = new Queries(); 
     update.update(price, name);//invoke the method using the object 
}