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Moving file parser inside the core-java module. 

Adding Test cases for reading files.
This commit is contained in:
RanjeetKaur17 2018-08-04 16:45:02 +04:00 committed by José Carlos Valero Sánchez
parent c0fb463b89
commit 840b0e1f9c
15 changed files with 159 additions and 98 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
file-parser/src/com/baeldung/fileparser/BufferedReaderExample.java → core-java/src/main/java/com/baeldung/fileparser/BufferedReaderExample.java
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@ -7,18 +7,8 @@ import java.util.ArrayList;
public class BufferedReaderExample {
private static final String FILENAME = "src/resources/txt.txt";
protected static ArrayList<String> generateArrayListFromFile(String filename) throws IOException {
public static void main(String[] args) {
try {
System.out.println(generateArrayListFromFile(FILENAME));
} catch (IOException e) {
e.printStackTrace();
}
}
private static ArrayList<String> generateArrayListFromFile(String filename) throws IOException {
ArrayList<String> result = new ArrayList<>();
try (BufferedReader br = new BufferedReader(new FileReader(filename))) {

8
core-java/src/main/java/com/baeldung/fileparser/FileConstants.java Normal file
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@ -0,0 +1,8 @@
package com.baeldung.fileparser;
public class FileConstants {
protected static final String TEXT_FILENAME = "src/main/resources/sampleTextFile.txt";
protected static final String NNUMBER_FILENAME = "src/main/resources/sampleNumberFile.txt";
}

31
core-java/src/main/java/com/baeldung/fileparser/FileReaderExample.java Normal file
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@ -0,0 +1,31 @@
package com.baeldung.fileparser;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
public class FileReaderExample {
protected static ArrayList<String> generateArrayListFromFile(String filename) throws IOException {
ArrayList<String> result = new ArrayList<>();
try (FileReader f = new FileReader(filename)) {
StringBuffer sb = new StringBuffer();
while (f.ready()) {
char c = (char) f.read();
if (c == '\n') {
result.add(sb.toString());
sb = new StringBuffer();
} else {
sb.append(c);
}
}
if (sb.length() > 0) {
result.add(sb.toString());
}
}
return result;
}
}

18
core-java/src/main/java/com/baeldung/fileparser/FilesReadLinesExample.java Normal file
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@ -0,0 +1,18 @@
package com.baeldung.fileparser;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.List;
public class FilesReadLinesExample {
protected static ArrayList<String> generateArrayListFromFile(String filename) throws IOException {
List<String> result = Files.readAllLines(Paths.get(filename));
return (ArrayList<String>) result;
}
}

12
file-parser/src/com/baeldung/fileparser/ScannerIntExample.java → core-java/src/main/java/com/baeldung/fileparser/ScannerIntExample.java
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@ -7,17 +7,7 @@ import java.util.Scanner;
public class ScannerIntExample {
private static final String FILENAME = "src/resources/num.txt";
public static void main(String[] args) {
try {
System.out.println(generateArrayListFromFile(FILENAME));
} catch (IOException e) {
e.printStackTrace();
}
}
private static ArrayList<Integer> generateArrayListFromFile(String filename) throws IOException {
protected static ArrayList<Integer> generateArrayListFromFile(String filename) throws IOException {
ArrayList<Integer> result = new ArrayList<>();

12
file-parser/src/com/baeldung/fileparser/ScannerStringExample.java → core-java/src/main/java/com/baeldung/fileparser/ScannerStringExample.java
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@ -7,17 +7,7 @@ import java.util.Scanner;
public class ScannerStringExample {
private static final String FILENAME = "src/resources/txt.txt";
public static void main(String[] args) {
try {
System.out.println(generateArrayListFromFile(FILENAME));
} catch (IOException e) {
e.printStackTrace();
}
}
private static ArrayList<String> generateArrayListFromFile(String filename) throws IOException {
protected static ArrayList<String> generateArrayListFromFile(String filename) throws IOException {
ArrayList<String> result = new ArrayList<>();

19
core-java/src/test/java/com/baeldung/fileparser/BufferedReaderUnitTest.java Normal file
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@ -0,0 +1,19 @@
package com.baeldung.fileparser;
import static org.junit.Assert.assertTrue;
import java.io.IOException;
import java.util.List;
import org.junit.Test;
public class BufferedReaderUnitTest {
protected static final String TEXT_FILENAME = "src/test/resources/sampleTextFile.txt";
@Test
public void whenParsingExistingTextFile_thenGetArrayList() throws IOException {
List<String> lines = BufferedReaderExample.generateArrayListFromFile(TEXT_FILENAME);
assertTrue("File does not has 2 lines", lines.size() == 2);
}
}

19
core-java/src/test/java/com/baeldung/fileparser/FileReaderUnitTest.java Normal file
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@ -0,0 +1,19 @@
package com.baeldung.fileparser;
import static org.junit.Assert.assertTrue;
import java.io.IOException;
import java.util.List;
import org.junit.Test;
public class FileReaderUnitTest {
protected static final String TEXT_FILENAME = "src/test/resources/sampleTextFile.txt";
@Test
public void whenParsingExistingTextFile_thenGetArrayList() throws IOException {
List<String> lines = FileReaderExample.generateArrayListFromFile(TEXT_FILENAME);
assertTrue("File does not has 2 lines", lines.size() == 2);
}
}

19
core-java/src/test/java/com/baeldung/fileparser/FilesReadAllLinesUnitTest.java Normal file
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@ -0,0 +1,19 @@
package com.baeldung.fileparser;
import static org.junit.Assert.assertTrue;
import java.io.IOException;
import java.util.List;
import org.junit.Test;
public class FilesReadAllLinesUnitTest {
protected static final String TEXT_FILENAME = "src/test/resources/sampleTextFile.txt";
@Test
public void whenParsingExistingTextFile_thenGetArrayList() throws IOException {
List<String> lines = FilesReadLinesExample.generateArrayListFromFile(TEXT_FILENAME);
assertTrue("File does not has 2 lines", lines.size() == 2);
}
}

19
core-java/src/test/java/com/baeldung/fileparser/ScannerIntUnitTest.java Normal file
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@ -0,0 +1,19 @@
package com.baeldung.fileparser;
import static org.junit.Assert.assertTrue;
import java.io.IOException;
import java.util.List;
import org.junit.Test;
public class ScannerIntUnitTest {
protected static final String NUMBER_FILENAME = "src/test/resources/sampleNumberFile.txt";
@Test
public void whenParsingExistingTextFile_thenGetIntArrayList() throws IOException {
List<Integer> numbers = ScannerIntExample.generateArrayListFromFile(NUMBER_FILENAME);
assertTrue("File does not has 2 lines", numbers.size() == 2);
}
}

19
core-java/src/test/java/com/baeldung/fileparser/ScannerStringUnitTest.java Normal file
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@ -0,0 +1,19 @@
package com.baeldung.fileparser;
import static org.junit.Assert.assertTrue;
import java.io.IOException;
import java.util.List;
import org.junit.Test;
public class ScannerStringUnitTest {
protected static final String TEXT_FILENAME = "src/test/resources/sampleTextFile.txt";
@Test
public void whenParsingExistingTextFile_thenGetArrayList() throws IOException {
List<String> lines = ScannerStringExample.generateArrayListFromFile(TEXT_FILENAME);
assertTrue("File does not has 2 lines", lines.size() == 2);
}
}

2
core-java/src/test/resources/sampleNumberFile.txt Normal file
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@ -0,0 +1,2 @@
111
222

2
core-java/src/test/resources/sampleTextFile.txt Normal file
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@ -0,0 +1,2 @@
Hello
World

37
file-parser/src/com/baeldung/fileparser/FileReaderExample.java
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@ -1,37 +0,0 @@
package com.baeldung.fileparser;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
public class FileReaderExample {
private static final String FILENAME = "src/resources/txt.txt";
public static void main(String[] args) {
try {
System.out.println(generateArrayListFromFile(FILENAME));
} catch (IOException e) {
e.printStackTrace();
}
}
private static ArrayList<Character> generateArrayListFromFile(String filename) throws IOException {
ArrayList<Character> result = new ArrayList<>();
try (FileReader f = new FileReader(filename)) {
while (f.ready()) {
char c = (char) f.read();
if (c != ' ' && c != '\t' && c != '\n') {
result.add(c);
}
}
return result;
}
}
}

28
file-parser/src/com/baeldung/fileparser/FilesReadLineExample.java
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@ -1,28 +0,0 @@
package com.baeldung.fileparser;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.List;
public class FilesReadLineExample {
private static final String FILENAME = "src/resources/txt.txt";
public static void main(String[] args) {
try {
System.out.println(generateArrayListFromFile(FILENAME));
} catch (IOException e) {
e.printStackTrace();
}
}
private static ArrayList<String> generateArrayListFromFile(String filename) throws IOException {
List<String> result = Files.readAllLines(Paths.get(filename));
return (ArrayList<String>) result;
}
}