java 想要在标签中显示日期
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Want to display date in a label
提问by obi1kinobi
Can you please help me with this codes, I am trying to show the current date in a label, but am using 3 different class, ie, the main class(AppStart), the class which I create the label in ad it will display the label in the frame, thus the (Swing1) and then the date class it self (DateLabel). The code is shown below:
你能帮我这个代码吗，我试图在标签中显示当前日期，但我使用了 3 个不同的类，即主类（AppStart），我在广告中创建标签的类它将显示框架中的标签，因此是（Swing1），然后是它自己的日期类（DateLabel）。代码如下所示：
public DateLabel()
{
Date today = new Date();
//Date format
DateFormat df = DateFormat.getDateInstance(DateFormat.SHORT, Locale.US);
String strDate = df.format(today);
setText( strDate);
}
}
import java.awt.*;//used for Gui Developement
import java.util.*;
import java.text.*;
import javax.swing.*;//Used for GUI development
public class Swing1 extends JFrame
{
JLabel lblWelcome;
DateLabel myDate;
Swing1()
{
JFrame myJF = new JFrame();
myJF.setTitle("CBT Tutorial");
//JLabel Stuff
myDate = new DateLabel();
Container c = getContentPane();
c.add(myDate, BorderLayout.NORTH);
myJF.setSize(300,300);
myJF.show();
}
}
public class AppStart {
/**
* @param args the command line arguments
*/
public static void main(String[] args)
{
new Swing1();
}
}
回答by Moses Kirathe
To anyone using netbeans visual builder, I found a faster way to do this.
对于使用 netbeans 可视化构建器的任何人，我找到了一种更快的方法来做到这一点。
public classname{
Initcomponents();
String date= new Date.toString();
Yourlabelname.setText(date)}
}
Hope it helps a stranded one!:-)
希望它可以帮助一个搁浅的人！:-)
回答by f4lco
DateLabelmust extend JLabel, otherwise setTextwon't work as well as adding the custom label to the Container.
DateLabel必须扩展JLabel，否则setText将无法像将自定义标签添加到Container.
回答by G_H
No need to create a new JFrame in your Swing1 constructor. Swing1 extends JFrame, just do getContentPane().add(myDate, BorderLayout.NORTH);on the Swing1 instance itself. Make sure to call super()as the first statement in your constructor, maybe with a suitable argument set (e.g. if you need double buffering or such).
无需在 Swing1 构造函数中创建新的 JFrame。Swing1 扩展了 JFrame，只需getContentPane().add(myDate, BorderLayout.NORTH);在 Swing1 实例本身上执行即可。确保super()作为构造函数中的第一条语句调用，可能使用合适的参数集（例如，如果您需要双缓冲等）。
