20110328-String str str这是str“null”String strpublic void test(){str ?str +}?这是strnu
20110328-String str; str="";这是str=“null”
String str;
public void test(){
str =?str +"";
}
?
这是str="null";
20110328-String str; str="";这是str=“null”
String str;
public void test(){
str =?str +"";
}
?
这是str="null";