星期二的收获

上午：练习文件的读写（FileWriter字符输出流和FileReader字符输入流）

package com.chinasoft.test.WS;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class Rea {

	public static void main(String[] args) throws IOException  {
		// TODO Auto-generated method stub
    FileWriter file = new FileWriter("zhege.txt");
    String str = "这里面是空的";
    file.write(str);
    file.flush();
    
    FileReader file1 = new FileReader("zhege.txt");
    int a = file1.read();
    while(a !=-1){
    	System.out.print((char)a);
    	a = file1.read();
    }
    file1.close();
	}

}

　　下午：异常处理

package com.chinasoft.test.WS;

public class Yichang {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		try{
		     System.out.println("try");
		     int c = 10/0;
		  }catch(Exception e) {
		   System.out.println("Exception");
		  }
		  finally{
		   System.out.println("Finally");
		  }

	}

　　网络编程：

TCP/IP模型有四层结构①应用层②传输层③网络层④链路层