grep piple & file

please notice that the string appended to grep command should be piple or file name, should not be just a string.

 

of course you can exploit the temp file for your resolution as possible as you can.

 

dos copy --> right click

 

Below is an example:

 

 1 #!/bin/bash
 2 
 3 #----------------------------------------------------------------
 4 # This script is used to extract the methods of the java class
 5 #-----------------------------------------------------------------
 6 cat java.java | while read line
 7 do
 8  #echo $line > temp.txt
 9  #grep "public class" temp.txt >> result.txt
10  #grep "public.*{" temp.txt >> result.txt
11  #grep "private.*{" temp.txt >> result.txt
12  #rm temp.txt
13  
14  if [[ -n `echo $line | grep "public class"` ]]
15  then 
16      echo $line >> result.txt
17  elif [[ -n `echo $line | grep "public.*{"` ]]
18  then
19      echo $line >> result.txt
20  elif [[ -n `echo $line | grep "private.*{"` ]]
21  then
22   echo $line >> result.txt
23  else
24   echo hello
25   continue
26  fi
27 done