ip_input.java

来自「软件工程实践课程的答案哦」· Java 代码 · 共 129 行

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;

public class IP_Input extends JDialog implements ActionListener
{
	private JTextField text;
	
	private JLabel label1;
	
	private JButton confirm;
	private GameFace face;
	
	public IP_Input(GameFace face)
	{
		setTitle(
		"Please Enter the Host IP Address");
		this.face=face;
		
		Container c=getContentPane();
		c.setLayout(new FlowLayout());
		
		label1=new JLabel("IP:");
		
		
		text=new JTextField(20);
		text.addActionListener(this);
		
		
		confirm=new JButton("OK");
		confirm.addActionListener(this);
		
		c.add(label1);
		c.add(text);
		
	
		c.add(confirm);
		
		setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
		setSize(300,120);
		setLocation(245,200);
		show();
		
	}
	
	public void actionPerformed(ActionEvent e)
	{
		if (e.getSource()==confirm||e.getSource()==text)
		{
			boolean flag=checkFormat();
			if(flag==false)
			{
				JOptionPane.showMessageDialog(null,"Please check the IP format !");
				text.requestFocus(true);
			}
			else
			{
				String s=(text.getText()).trim();
			
				System.out.println(s);
			
			
				Communication.setServerIP(s);
				Communication.setGameFace(face);
		        Communication.init();
				Name_Input name=new Name_Input(face);
				//this.setVisible(false);
				this.dispose();
			}
		}
	
	}
	
	public boolean checkFormat()
	{
		String s=text.getText();
		String s1,s2,s3,s4="";
		int[] n=new int[3];
		int pointer=0;
		
		for(int i=0;i<s.length();i++)
		{
			char ch=s.charAt(i);
			if(ch=='.')
			{
				n[pointer]=i;
				pointer++;
			}
		}
		
		if(pointer!=3)
			return false;
	    else
	    {
	    	s1=s.substring(0,n[0]);
	    	s2=s.substring(n[0]+1,n[1]);
	    	s3=s.substring(n[1]+1,n[2]);
	    	s4=s.substring(n[2]+1);
	    	
	    	
	    	
	    	try{
	    		int n1=Integer.parseInt(s1);
	    		int n2=Integer.parseInt(s2);
	    		int n3=Integer.parseInt(s3);
	    		int n4=Integer.parseInt(s4);
	    		
	    		if((n1>=0&&n1<256)&&(n2>=0&&n2<256)&&(n3>=0&&n3<256)&&(n4>=0&&n4<256))
	    		   return true;
	    		else
	    		   return false;
	    	}catch(NumberFormatException e)
	    	 {
	    	 	return false;
	    	 }
	    
	    	
	    			
	    }
	}
	
	
	public static void main(String[] args)
	{
		new IP_Input(new GameFace());
	}
    
}