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Copy pathFileHandler.java
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72 lines (63 loc) · 2.29 KB
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import java.io.File;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
public class FileHandler {
void writeAndClose(String fileName, WritingProcess process) {
try {
File file = new File(fileName);
file.createNewFile();
invokeProcess(process, file);
} catch (IOException ex) {
ex.printStackTrace();
}
}
void invokeProcess(WritingProcess process, File file) {
try (BufferedWriter bw = new BufferedWriter(new FileWriter(file))) {
process.execute(bw);
} catch (IllegalArgumentException | IOException | SecurityException e) {
e.printStackTrace();
}
}
public String readAndClose(String fileName, ReadingProcess process) {
File file = new File(fileName);
try {
file.createNewFile();
return invokeProcess(process, file);
} catch (IOException ex) {
ex.printStackTrace();
}
return "";
}
String invokeProcess(ReadingProcess process, File file) {
try (BufferedReader br = new BufferedReader(new FileReader(file))) {
return process.execute(br);
} catch (IllegalArgumentException | IOException | SecurityException e) {
e.printStackTrace();
}
return "";
}
public static void main(String[] args) {
FileHandler fh = new FileHandler();
fh.writeAndClose("/Users/am/Documents/temp.txt",
bufferedWriter -> bufferedWriter.write("Alhamdulillah!\n"));
System.out.println(fh.readAndClose("/Users/am/Documents/temp.txt",
bufferedReader -> bufferedReader.readLine()));
System.out.println(fh.readAndClose("/Users/am/Documents/java_wikipedia_article.txt",
bufferedReader -> {
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = bufferedReader.readLine()) != null)
sb.append(line);
return sb.toString();
}));
}
}
interface ReadingProcess {
String execute(BufferedReader bufferedReader) throws IOException;
}
interface WritingProcess {
void execute(BufferedWriter bufferedWriter) throws IOException;
}