Java：如何从文本文件中删除具有相同前缀的字符串？

Question

I need to replace some string from a text file such as "upcoming:event=123982".

The strings always start with "upcoming:event=". How can I remove them (including the digits) ? (I'm processing the text with Java).

Should I use wildcards ? something like "upcoming:event=*" ?

thanks

Answer 1

String str = "upcoming:event=123982";
System.out.println(str.replaceFirst("upcoming:event=[0-9]*", "changed"));

Output: changed

Answer 2

 String s="upcoming:event=123982;upcoming:event=100;upcoming:event=200;upcoming:event=900;upcoming:event=1987";
System.out.println(s.replaceAll("upcoming:event=[0-9]*", ""));

Output:

123982;100;200;900;1987

Answer 3

使用String.startsWith();

Answer 4

Even though this is probably is not a good way you could

String text = "upcoming:event=*YOUR TEXT";      
System.out.println(text.replace("upcoming:event=*", ""));

Result will be YOUR TEXT in this case...