问题描述

新手麻烦帮下怎么都不显示

package p1;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.*;

import javax.swing.*;

public class FCFS extends JFrame implements ActionListener{

 Vector workVector;
int status[]={0,0,0,0,0};
String workname[]={"作业名","提交时刻","要求运行时间","运行时刻","完成时刻","周转时间","带权周转时间"};
String worktable[][]=new String[5][7];
JTable workjtable;
JScrollPane messageScrollPane;
JToolBar toolBar = new JToolBar();
JButton InputButton;
JButton FCFSButton;
JButton exitButton;
JTextField show;
JTextArea source;
public void actionPerformed(ActionEvent e)
{
    Object obj = e.getSource();
    if (obj ==InputButton)
    {
        String stringnum;
        Work work=new Work();
        stringnum=JOptionPane.showInputDialog(this,"作业名、提交时刻、要求运行时间").trim();
        StringTokenizer st0 = new StringTokenizer(stringnum);
        System.out.println(stringnum);
        if(st0.hasMoreTokens())
        {
            work.workname=(String)st0.nextToken();
            source.append("作业:  "+work.workname);
        }
        if(st0.hasMoreTokens())
        {
                    work.refertime=Double.valueOf(st0.nextToken()).doubleValue();
            source.append("提交时间为:  "+work.refertime);
        }
        if(st0.hasMoreTokens())
        {
            work.needtime=Double.valueOf(st0.nextToken()).doubleValue();
            source.append("要求运行时间为:  "+work.needtime);
        }
        source.append("n");
        workVector.add(work);
    }
    if ( obj == FCFSButton)
    {
          for(int a=0;a<5;a++)
          {
             status[a]=0;
          }
           int i=0;
           double minrefertime,finishtime=0,T=0,sunT=0,sunW=0,W=0;
           Work work=new Work();
           Work work1=new Work();
           Work work2=new Work();
           String msg;
           while(i<workVector.size())
           {
             if(status[i]==0)
             {
                work=(Work)workVector.elementAt(i);
                worktable[i][0]=String.valueOf(work.workname);
                worktable[i][1]=String.valueOf(work.refertime);
                worktable[i][2]= String.valueOf(work.needtime);
                minrefertime=work.refertime;
                int j=0,k=i;
                while(j<workVector.size()) //找出最先到达的进程
                {
                    work1=(Work)workVector.elementAt(j);//指定索引处
                    if(minrefertime>work1.refertime&&status[j]==0)
                     {
                        minrefertime=work1.refertime;
                        k=j;
                     }
                    j++;
                 }
               T=sunT/i;
           W=sunW/i;
           msg="平均周转时间T="+T+"时间单位"+","+"平均带权周转时间W="+W;
           workjtable=new JTable(worktable,workname);
           show=new JTextField(30);
         show.setText(msg);
           messageScrollPane = new JScrollPane(workjtable,
                       JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
                       JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
           messageScrollPane.setPreferredSize(new Dimension(400, 101));
           messageScrollPane.revalidate();
           JFrame frame=new JFrame();
           frame.setSize(400,180);
           frame.setLocation(200,300);
           frame.setTitle("FCFS的作业调度");
           frame.setLayout(new BorderLayout());
           frame.add(messageScrollPane,BorderLayout.NORTH);
           frame.add(show,BorderLayout.CENTER);
           frame.setVisible(true);
    }
    if ( obj == exitButton)
    {
        int j=JOptionPane.showConfirmDialog(this,"真的要停止服务吗","停止服务",JOptionPane.YES_OPTION,JOptionPane.QUESTION_MESSAGE);
        if(j==JOptionPane.YES_OPTION)
         {
            System.exit(0);
         }
    }
}}}
 public static void main(String arg[])
   {
     FCFS FCFS1=new FCFS();

   }
 class Work
 {
   String workname=null;
   double refertime=0;
   double needtime=0;
   double starttime=0;
   double finishtime=0;
   double alltime=0;
   double ratealltime=0;
 }

}

解决方案

你把ui界面截个图，那么多代码谁知道你想实现显示什么东西

解决方案二：

你定义了一个类，而主程序只是创建了一个对象而已，当然没有什么东西显示。。。。