语源科技BlogJava-olaterohttp://www.blogjava.net/olatero/zh-cnSun, 12 Apr 2026 06:03:06 GMTSun, 12 Apr 2026 06:03:06 GMT60Linux 操作记录http://www.blogjava.net/olatero/archive/2011/07/14/354301.htmllaterlaterThu, 14 Jul 2011 01:08:00 GMThttp://www.blogjava.net/olatero/archive/2011/07/14/354301.htmlhttp://www.blogjava.net/olatero/comments/354301.htmlhttp://www.blogjava.net/olatero/archive/2011/07/14/354301.html#Feedback0http://www.blogjava.net/olatero/comments/commentRss/354301.htmlhttp://www.blogjava.net/olatero/services/trackbacks/354301.html更改文件夹所有者 chwon -R unroot:unroot  /home/test/ ------ 修改test目录以及子目录所有文件的所有者          


later 2011-07-14 09:08 发表评论
]]>2011年7月11日12:13:04http://www.blogjava.net/olatero/archive/2011/07/11/354103.htmllaterlaterMon, 11 Jul 2011 04:38:00 GMThttp://www.blogjava.net/olatero/archive/2011/07/11/354103.html阅读全文

later 2011-07-11 12:38 发表评论
]]>赋值操后，对象的引用发生变化http://www.blogjava.net/olatero/archive/2011/07/07/353844.htmllaterlaterThu, 07 Jul 2011 01:24:00 GMThttp://www.blogjava.net/olatero/archive/2011/07/07/353844.htmlhttp://www.blogjava.net/olatero/comments/353844.htmlhttp://www.blogjava.net/olatero/archive/2011/07/07/353844.html#Feedback0http://www.blogjava.net/olatero/comments/commentRss/353844.htmlhttp://www.blogjava.net/olatero/services/trackbacks/353844.html
class Tank{
int level;
String msg;
Tmp tmp;
@Override
public String toString() {
return "level = "+level+" msg="+msg+" tmp="+tmp;
}
}
class Tmp{
private String name;
public Tmp(String name){
this.name=name;
}
@Override
public String toString() {
return this.name;
}
}

-----------------
Tank t1 = new Tank();
t1.level =1;
t1.msg="message 1";
t1.tmp = new Tmp("tmp 1");
System.out.println(t1);
Tank t2 = new Tank();
t2.level =2;
t2.msg="message 2";
t2.tmp = new Tmp("tmp 2");
System.out.println(t2);
t1 = t2 ;

t2赋值给t1后，t2中原对象的引用也指向了t1对象的引用，原先t2对象的引用被覆盖，信息丢失。
此时t2与t1指向同一个引用。


later 2011-07-07 09:24 发表评论
]]>Oracle --- sql 小计http://www.blogjava.net/olatero/archive/2011/07/06/353803.htmllaterlaterWed, 06 Jul 2011 08:31:00 GMThttp://www.blogjava.net/olatero/archive/2011/07/06/353803.htmlhttp://www.blogjava.net/olatero/comments/353803.htmlhttp://www.blogjava.net/olatero/archive/2011/07/06/353803.html#Feedback0http://www.blogjava.net/olatero/comments/commentRss/353803.htmlhttp://www.blogjava.net/olatero/services/trackbacks/353803.html阅读全文

later 2011-07-06 16:31 发表评论
]]>