controllstop.java

这是个可以进行多项选择的系统

package exam.web;

import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.Set;

import javax.swing.JButton;
import javax.swing.JFrame;

public class ControllStop {
	private JFrame jf;
	// private Socket is;
	private JButton jb1, jb2;
	private Set<Socket> is;
	private ExamServer as;

	public ControllStop(Set<Socket> s,ExamServer es) {
		this.is = s;
		this.as=es;
		jf = new JFrame("控制开关");
		jb1 = new JButton("暂停");
		jb2 = new JButton("重新开始");
		jb1.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
				as.setStop(true);
				jb1.setVisible(false);
				jb2.setVisible(true);
				for (Socket s : is) {
					try {
						PrintWriter pw = new PrintWriter(s.getOutputStream());
						pw.println("stop");
						pw.flush();
					} catch (IOException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
				}
			}

		});
		jb2.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
				as.setStop(false);
				jb1.setVisible(true);
				jb2.setVisible(false);
				for (Socket s : is) {
					try {
						PrintWriter pw = new PrintWriter(s.getOutputStream());
						pw.println("again");
						pw.flush();
					} catch (IOException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
				}
			}

		});
		jf.setLayout(new FlowLayout());
		jf.add(jb1);
		jf.add(jb2);
		jf.setLocation(200, 200);
		jf.pack();
		jf.setVisible(true);
		jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

	}

}