Question

Java源代码注释

小弟刚开始学，很多看不明白，请各位帮忙注释一下，谢谢了！这是个数据库连接池~ package dda;import java.sql.*;import java.io.LineNumberReader;import java.io.FileReader;import java.util.StringTokenizer;public class DbConnection{  Connection conn = null; ResultSet rs = null; boolean b ; public DbConnection(){  this.b = false;  this.getDBConfig(); }  String strSeparate = " ";  String strFileName = "DBConfig.txt";  String strUserID = null; String strUserPWD = null;  String strDB = null;   public void getDBConfig(){  //this.getDBConfig();  try{   LineNumberReader oLineNumberReader = new LineNumberReader(new FileReader(this.strFileName));   String strLine = null;   while((strLine = oLineNumberReader.readLine()) != null){    StringTokenizer token = new StringTokenizer(strLine,(new String(this.strSeparate).toString()));    this.strDB = token.nextToken();    this.strUserID = token.nextToken();    this.strUserPWD = token.nextToken();   }  }catch(Exception e){   //System.out.println("DB:"+strFileName);  } }  /** <br>鏁版嵁搴撹繛鎺

Answer 1

你的这段代码是获取配置文件中数据库配置信息
配置内容都在DBConfig.txt 这个文件中了

package dda;

import java.sql.*;
import java.io.LineNumberReader;
import java.io.FileReader;
import java.util.StringTokenizer;

/**
*
* 读取配置文件DBConfig.txt中的配置信息
* @author xxx
* @version 1.0
*/
public class DbConnection {
Connection conn = null;
ResultSet rs = null;
boolean b;

public DbConnection() {
this.b = false;
this.getDBConfig();
}
/* 定义变量 */
String strSeparate = " ";
String strFileName = "DBConfig.txt";
String strUserID = null;
String strUserPWD = null;
String strDB = null;

public void getDBConfig() {
this.getDBConfig();
try {
LineNumberReader oLineNumberReader = new LineNumberReader(
new FileReader(this.strFileName)); // 从 DBConfig.txt 文件中读取数据库配置
String strLine = null;
while ((strLine = oLineNumberReader.readLine()) != null) {// 遍历配置文件中每一行数据
StringTokenizer token = new StringTokenizer(strLine,(new String(this.strSeparate).toString())); // 按空格拆分配置内容
/* 以下三行都是给属性设值，获取配置属性 */
this.strDB = token.nextToken();
this.strUserID = token.nextToken();
this.strUserPWD = token.nextToken();
}
} catch (Exception e) {
System.out.println("DB:"+strFileName);
}

}
}

Answer 2

The type Computer must implement the inherited abstract method Usb.connection(Computer, Keyboard)

Answer 3

请换行，问问题有点水准。

Answer 4

请换行