import java.io.IOException; import java.io.OutputStream; public class SystemDemo02 { public static void main(String[] args) { OutputStream out = System.out; try{ out.write("hello".getBytes()); } catch(IOException e) { e.printStackTrace(); } try{ out.close(); }catch(IOException e) { e.printStackTrace(); } } }
out.flush(); out.close(); 在关闭前先flush();
using System; using System.Collections.Generic; using System.Linq; using System.Text;namespace ClannanSystemModel { public class UserModel { private int _UserID; //用户ID private string _UserName; //用户名称 private string _UserPwd; //用户密码 private string _UserEmail; //电子邮箱 private int _State; //状态(0不可用,1可用) /// <summary> /// 用户ID /// </summary> public int UserID { get { return _UserID; } set { _UserID = value; } }
/// <summary> /// 用户名称 /// </summary> public string UserName { get { return _UserName; } set { _UserName = value; } } /// <summary> /// 用户密码 /// </summary> public string UserPwd { get { return _UserPwd; } set { _UserPwd = value; } } /// <summary> /// 电子邮箱 /// </summary> public string UserEmail { get { return _UserEmail; } set { _UserEmail = value; } } /// <summary> /// 状态(0不可用,1可用) /// </summary> public int State { get { return _State; } set { _State = value; } } } }
using System; using System.Collections.Generic; using System.Linq; using System.Text;namespace ClannanSystemModel { public class UserModel { private int _UserID; //用户ID private string _UserName; //用户名称 private string _UserPwd; //用户密码 private string _UserEmail; //电子邮箱 private int _State; //状态(0不可用,1可用) /// <summary> /// 用户ID /// </summary> public int UserID { get { return _UserID; } set { _UserID = value; } }
/// <summary> /// 用户名称 /// </summary> public string UserName { get { return _UserName; } set { _UserName = value; } } /// <summary> /// 用户密码 /// </summary> public string UserPwd { get { return _UserPwd; } set { _UserPwd = value; } } /// <summary> /// 电子邮箱 /// </summary> public string UserEmail { get { return _UserEmail; } set { _UserEmail = value; } } /// <summary> /// 状态(0不可用,1可用) /// </summary> public int State { get { return _State; } set { _State = value; } } } }
import java.io.OutputStream;
public class SystemDemo02
{
public static void main(String[] args)
{
OutputStream out = System.out;
try{ out.write("hello".getBytes());
}
catch(IOException e)
{
e.printStackTrace();
}
try{ out.close();
}catch(IOException e)
{
e.printStackTrace();
} } }
我用GIV编辑器,在命令窗口运行没有任何的错误和警告呀!!!
输出是:hello
或者移动过包,而eclipse没重新编译。
去看下编译后的.class文件在哪里。
1.Project 》 Clean
2.Project 》 Build Project。
你查看下,在你的环境变量里有没有CLASSPATH ,如果没有就加上吧。
“我的电脑”属性-高级-环境变量-新建(系统变量)
变量名 :CLASSPATH
变量值 :.\;%JAVA_HOME%\lib\tools.jar;
或变量值:.;%JAVA_HOME%\lib\dt.jar;%JAVA_HOME%\lib\tools.jar;注意变量值前面那个”.”。
package com.mystudy.test2;import java.io.IOException;
import java.io.OutputStream;public class SystemOutDemo {
public static void main(String[] args) {
OutputStream out = System.out;
try {
out.write("hello".getBytes());
} catch (IOException e) {
e.printStackTrace();
}
try {
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}}
运行结果为hello
try{
out.write("hello".getBytes());
}catch(IOException e){
e.printStackTrace();
}
try{
out.flush();
out.close();
}catch(IOException e){
e.printStackTrace();
}
import java.io.OutputStream;
public class SystemDemo02
{
public static void main(String[] args)
{
OutputStream out = System.out;
try{ out.write("hello".getBytes());
}
catch(IOException e)
{
e.printStackTrace();
}
try{ out.close();
}catch(IOException e)
{
e.printStackTrace();
} } }
out.close();
在关闭前先flush();
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;namespace ClannanSystemModel
{
public class UserModel
{ private int _UserID; //用户ID
private string _UserName; //用户名称
private string _UserPwd; //用户密码
private string _UserEmail; //电子邮箱
private int _State; //状态(0不可用,1可用) /// <summary>
/// 用户ID
/// </summary>
public int UserID
{
get { return _UserID; }
set { _UserID = value; }
}
/// <summary>
/// 用户名称
/// </summary>
public string UserName
{
get { return _UserName; }
set { _UserName = value; }
} /// <summary>
/// 用户密码
/// </summary>
public string UserPwd
{
get { return _UserPwd; }
set { _UserPwd = value; }
} /// <summary>
/// 电子邮箱
/// </summary>
public string UserEmail
{
get { return _UserEmail; }
set { _UserEmail = value; }
} /// <summary>
/// 状态(0不可用,1可用)
/// </summary>
public int State
{
get { return _State; }
set { _State = value; }
} }
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;namespace ClannanSystemModel
{
public class UserModel
{ private int _UserID; //用户ID
private string _UserName; //用户名称
private string _UserPwd; //用户密码
private string _UserEmail; //电子邮箱
private int _State; //状态(0不可用,1可用) /// <summary>
/// 用户ID
/// </summary>
public int UserID
{
get { return _UserID; }
set { _UserID = value; }
}
/// <summary>
/// 用户名称
/// </summary>
public string UserName
{
get { return _UserName; }
set { _UserName = value; }
} /// <summary>
/// 用户密码
/// </summary>
public string UserPwd
{
get { return _UserPwd; }
set { _UserPwd = value; }
} /// <summary>
/// 电子邮箱
/// </summary>
public string UserEmail
{
get { return _UserEmail; }
set { _UserEmail = value; }
} /// <summary>
/// 状态(0不可用,1可用)
/// </summary>
public int State
{
get { return _State; }
set { _State = value; }
} }
}