Hi All,
i want to run shell script from java.shell script run successfully and generate a file.
But when i want to check the existence of that file,it shows that the file is not present.
please help me to check the file from java or how could i know the proccess(Shell script) is finished.
i have given my code below.
package com;
import java.io.*;
import java.util.*;
public class ScriptBuilder {
public ScriptBuilder() {
}
public void writeScript() throws java.io.IOExcep tion {
Runtime rt = Runtime.getRunt ime();
rt.exec("chmod 777 testinglinux.sh ");
Process p = rt.exec("./testinglinux.sh ");
try {
p.waitFor();
} catch (Exception e) {
e.printStackTra ce();
}
String shellfilename = "testing.tx t";
if (new File(shellfilen ame).exists()) {
System.out.prin tln(shellfilena me+" File exists");
}
}
public static void main(String[] args) throws java.io.IOExcep tion {
ScriptBuilder sb = new ScriptBuilder() ;
sb.writeScript( );
}
}
Thanks!
Vaskar
3 23619
Hi All,
i want to run shell script from java.shell script run successfully and generate a file.
But when i want to check the existence of that file,it shows that the file is not present.
please help me to check the file from java or how could i know the proccess(Shell script) is finished.
i have given my code below.
package com;
import java.io.*;
import java.util.*;
public class ScriptBuilder {
public ScriptBuilder() {
}
public void writeScript() throws java.io.IOExcep tion {
Runtime rt = Runtime.getRunt ime();
rt.exec("chmod 777 testinglinux.sh ");
Process p = rt.exec("./testinglinux.sh ");
try {
p.waitFor();
} catch (Exception e) {
e.printStackTra ce();
}
String shellfilename = "testing.tx t";
if (new File(shellfilen ame).exists()) {
System.out.prin tln(shellfilena me+" File exists");
}
}
public static void main(String[] args) throws java.io.IOExcep tion {
ScriptBuilder sb = new ScriptBuilder() ;
sb.writeScript( );
}
}
Thanks!
Vaskar
There is a File.exists() method. Will that do for you?
Having looked over your question again, I realize now that my response is meaningless.
What you need is this article which explains the traps one runs into when using Runtime.exec.
Hi All,
i want to run shell script from java.shell script run successfully and generate a file.
But when i want to check the existence of that file,it shows that the file is not present.
please help me to check the file from java or how could i know the proccess(Shell script) is finished.
i have given my code below. -
package com;
-
-
import java.io.*;
-
import java.util.*;
-
-
-
public class ScriptBuilder {
-
public ScriptBuilder() {
-
}
-
-
public void writeScript() throws java.io.IOException {
-
Runtime rt = Runtime.getRuntime();
-
rt.exec("chmod 777 testinglinux.sh");
-
Process p = rt.exec("./testinglinux.sh");
-
try {
-
p.waitFor();
-
} catch (Exception e) {
-
e.printStackTrace();
-
}
-
String shellfilename = "testing.txt";
-
if (new File(shellfilename).exists()) {
-
System.out.println(shellfilename+" File exists");
-
}
-
}
-
-
public static void main(String[] args) throws java.io.IOException {
-
ScriptBuilder sb = new ScriptBuilder();
-
sb.writeScript();
-
}
-
}
-
Thanks!
Vaskar
As I am in windows environment, I tried your program by changing the shell scrip to a batch file and it worked fine. I dont know any reason why it should fail for you.
To check the return status of the process use the exitValue method. A successful completion would return 0 exit value.
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