java中subString截取首位截取字符串末尾截取字符

java中subString截取首位截取字符串末尾截取字符

String str="(HOST = 192.168.1.217)";

String end = str.substring(str.length()-1);

end 就是你要的末尾值。

你的目的是不是就是只是为了获取端口号？？

说的不明白啊，规则是什么，首位是HOST，末尾是） ，为什么（ 不是首位

String a =
"(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.217)(PORT = 1521))";

a = a.substring(a.indexOf("HOST"));
a = a.substring(0, a.indexOf(")"));

String base = "(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.217)(PORT = 1521))";
String[] strs = base.split("(");
String result = strs[2].subString(0,str[2].length-1);

我想问一下，你这长长的字符串怎样来的，如果你想得到IP，用获得IP的方法，再拼接上"HOST="
更准确一点
String s="(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.217)(PORT = 1521))"
String str=s.substring(s.indexOf("HOST"),s.indexOf("PORT")-2)

String s = "(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.217)(PORT = 1521))";
int beginIndex = s.indexOf("H");
int endIndex = s.lastIndexOf("7");
String news = s.substring(beginIndex, endIndex+1);