Use FileWriter to write an array of strings to a file.

import java.io.FileWriter;

public class Main {
public static void main(String[] argv) throws Exception {
FileWriter fw = new FileWriter("file.dat");
String strs[] = { "com", "exe", "doc" };

for (int i = 0; i < strs.length; i++) {
fw.write(strs[i] + "\n");
}
fw.close();
}
}

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