Java标签消失
我想做一个简单的议程,但不知何故,当我运行编译器时,它不会加载标签的文本,有时会加载。我该如何解决这个问题 例如: (无法显示图片)Java标签消失,java,label,frame,Java,Label,Frame,我想做一个简单的议程,但不知何故,当我运行编译器时,它不会加载标签的文本,有时会加载。我该如何解决这个问题 例如: (无法显示图片) 下午13:00(这是经常出现的)课程A 下午13:30课程b 有时它会这样做: 下午13:00(总是出现)(然后什么都没有) 下午13:30 (请保持简单,因为我是初学者,来自荷兰) 代码: (我是初学者,所以不要看那些复制粘贴的东西) }移动frame.setVisible(true)到lastline将解决您的问题。添加组件后,您需要调用setvisible。
}移动
frame.setVisible(true)代码>到lastline将解决您的问题。添加组件后,您需要调用setvisible。或者您可以调用repaint()、revalidate()
你想让我们在没有UI代码或UI图像的情况下调试你的UI代码吗?我不认为这是代码的问题,它真的很奇怪。13:00pm我可以向你保证这是代码的问题。谢谢,成功了(我错了)
import javax.swing.*;
import java.awt.*;
class P{
public static void main(String [] args){
JFrame frame = new JFrame(" Agenda 10/13/2014");
frame.setDefaultCloseOperation(frame.EXIT_ON_CLOSE);
frame.setSize(620,620);
frame.setResizable(false);
frame.setVisible(true);
JLabel labeltime1 = new JLabel("1:00 - 1:30pm: ");
JLabel labeltime2 = new JLabel("1:30 - 2:00pm: ");
JLabel labeltime3 = new JLabel("2:00 - 2:30pm: ");
JLabel labeltime4 = new JLabel("2:30 - 3:00pm: ");
JLabel labeltime5 = new JLabel("3:00 - 3:30pm: ");
labeltime1.setForeground(Color.red);
labeltime2.setForeground(Color.red);
labeltime3.setForeground(Color.red);
labeltime4.setForeground(Color.red);
labeltime5.setForeground(Color.red);
JLabel space1 = new JLabel("\n");
JLabel space2 = new JLabel("\n");
JLabel space3 = new JLabel("\n");
JLabel space4 = new JLabel("\n");
JLabel space5 = new JLabel("\n");
JPanel timeP = new JPanel();
timeP.setBackground(Color.black);
timeP.setLayout(new BoxLayout(timeP, BoxLayout.Y_AXIS));
timeP.add(space5);
timeP.add(labeltime1);
timeP.add(space1);
timeP.add(labeltime2);
timeP.add(space2);
timeP.add(labeltime3);
timeP.add(space3);
timeP.add(labeltime4);
timeP.add(space4);
timeP.add(labeltime5);
frame.getContentPane().add(BorderLayout.WEST, timeP);
JPanel courses = new JPanel();
courses.setLayout(new BoxLayout(courses, BoxLayout.Y_AXIS));
courses.setBackground(Color.black);
frame.getContentPane().add(BorderLayout.CENTER,courses);
//Enter your course
JLabel course1 = new JLabel(" Course A");
JLabel course2 = new JLabel(" Course B");
JLabel course3 = new JLabel(" Course C");
JLabel course4 = new JLabel(" Course D");
JLabel course5 = new JLabel(" Course E");
course1.setForeground(Color.yellow);
course2.setForeground(Color.yellow);
course3.setForeground(Color.yellow);
course4.setForeground(Color.yellow);
course5.setForeground(Color.yellow);
JLabel space6 = new JLabel("\n");
JLabel space7 = new JLabel("\n");
JLabel space8 = new JLabel("\n");
JLabel space9 = new JLabel("\n");
JLabel space10 = new JLabel("\n");
courses.add(space6);
courses.add(course1);
courses.add(space7);
courses.add(course2);
courses.add(space8);
courses.add(course3);
courses.add(space9);
courses.add(course4);
courses.add(space10);
courses.add(course5);
}
import javax.swing.*;
import java.awt.*;
class P{
public static void main(String [] args){
JFrame frame = new JFrame(" Agenda 10/13/2014");
frame.setDefaultCloseOperation(frame.EXIT_ON_CLOSE);
frame.setSize(620,620);
frame.setResizable(false);
//frame.setVisible(true);//don't call this method here
JLabel labeltime1 = new JLabel("1:00 - 1:30pm: ");
JLabel labeltime2 = new JLabel("1:30 - 2:00pm: ");
JLabel labeltime3 = new JLabel("2:00 - 2:30pm: ");
JLabel labeltime4 = new JLabel("2:30 - 3:00pm: ");
JLabel labeltime5 = new JLabel("3:00 - 3:30pm: ");
labeltime1.setForeground(Color.red);
labeltime2.setForeground(Color.red);
labeltime3.setForeground(Color.red);
labeltime4.setForeground(Color.red);
labeltime5.setForeground(Color.red);
JLabel space1 = new JLabel("\n");
JLabel space2 = new JLabel("\n");
JLabel space3 = new JLabel("\n");
JLabel space4 = new JLabel("\n");
JLabel space5 = new JLabel("\n");
JPanel timeP = new JPanel();
timeP.setBackground(Color.black);
timeP.setLayout(new BoxLayout(timeP, BoxLayout.Y_AXIS));
timeP.add(space5);
timeP.add(labeltime1);
timeP.add(space1);
timeP.add(labeltime2);
timeP.add(space2);
timeP.add(labeltime3);
timeP.add(space3);
timeP.add(labeltime4);
timeP.add(space4);
timeP.add(labeltime5);
frame.getContentPane().add(BorderLayout.WEST, timeP);
JPanel courses = new JPanel();
courses.setLayout(new BoxLayout(courses, BoxLayout.Y_AXIS));
courses.setBackground(Color.black);
frame.getContentPane().add(BorderLayout.CENTER,courses);
//Enter your course
JLabel course1 = new JLabel(" Course A");
JLabel course2 = new JLabel(" Course B");
JLabel course3 = new JLabel(" Course C");
JLabel course4 = new JLabel(" Course D");
JLabel course5 = new JLabel(" Course E");
course1.setForeground(Color.yellow);
course2.setForeground(Color.yellow);
course3.setForeground(Color.yellow);
course4.setForeground(Color.yellow);
course5.setForeground(Color.yellow);
JLabel space6 = new JLabel("\n");
JLabel space7 = new JLabel("\n");
JLabel space8 = new JLabel("\n");
JLabel space9 = new JLabel("\n");
JLabel space10 = new JLabel("\n");
courses.add(space6);
courses.add(course1);
courses.add(space7);
courses.add(course2);
courses.add(space8);
courses.add(course3);
courses.add(space9);
courses.add(course4);
courses.add(space10);
courses.add(course5);
frame.setVisible(true);//call here
}
}