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Code:

1. import java.io.*;
2. public class Test1 {
3. public static void main(String[] args) {
4. for(int i=0; i<args.length; i++) {
5. System.out.print(args[i]);
6. }
7. System.out.println();
8. }
9. }

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Code:

1. import java.io.*;
3. public class Test2 {
4. public static void main(String[] args) {
5. System.out.println("Please enter the file path:");
6. try {
7. String fileName = "";
8. while(true) {
9. int readByte = System.in.read();
10. if(readByte==-1 ||readByte == '/r') {
11. break;
12. } else {
13. fileName += (char)readByte;
14. }
15. }
16. char[] buffer = new char[20];
17. FileReader fr = new FileReader(fileName);
18. while(true) {
19. int length = fr.read(buffer);
20. if(length<0) {
21. break;
22. } else {
23. String text = new String(buffer, 0, length);
24. System.out.print(text);
25. }
26. }
27. } catch(IOException e) {
28. e.printStackTrace();
29. }
30. }
31. }

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Code:

1. import java.io.*;
3. public class Test3 {
4. public static void main(String[] args) {
5. FileRWTest frw = new FileRWTest();
6. }
7. }
9. class FileRWTest {
10. BufferedReader br;
11. BufferedWriter bw;
12. File in = new File("input.txt");
13. File out = new File("output.txt");
14. char[] cBuf = new char[1024];
15. int off=0;
16. public FileRWTest() {
17. try {
18. if(!in.exists()) {
19. in.createNewFile();
20. }
21. if(!out.exists()) {
22. out.createNewFile();
23. }
24. br = new BufferedReader(new InputStreamReader(new FileInputStream(in)));
25. bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(out)));
26. while(br.readLine()!=null) {
27. br.read(cBuf,off,off+1024);
28. bw.write(cBuf,off,off+1024);
29. off += 1024;
30. }
31. br.close();
32. bw.close();
33. } catch(IOException e) {
34. e.printStackTrace();
35. }
36. }
37. }

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Code:

1. import java.io.*;
3. public class Test4 {
4. public static void main(String[] args) {
5. try {
6. byte[] by;
7. FileOutputStream fos = new FileOutputStream("data.txt",true);
8. for(int i=100; i<=999; i++) {
9. int a = i/100;
10. int b = i%100/10;
11. int c = i%10;
12. if(i == (int)(Math.pow(a,3)+Math.pow(b,3)+Math.pow(c,3))) {
13. String s = new String(i+"="+a+"*"+a+"*"+a+
14. "+"+b+"*"+b+"*"+b+
15. "+"+c+"*"+c+"*"+c+"/n");
17. by = s.getBytes();
18. fos.write(by,0,by.length);
19. } else {
20. continue;
21. }
22. }
23. fos.close();
24. } catch(IOException e) {
25. e.printStackTrace();
26. }
27. }
28. }

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Code:

1. import java.io.*;
3. public class Test5 {
4. static BufferedReader br;
5. static BufferedWriter bw;
6. static File in = new File("Test5.java");
7. static File out = new File("result.txt");
8. static String str1;
9. static String str2;
10. public static void main(String[] args) {
11. try {
12. if(!in.exists()) {
13. in.createNewFile();
14. }
15. if(!out.exists()) {
16. out.createNewFile();
17. }
18. br = new BufferedReader(new InputStreamReader(new FileInputStream(in)));
19. bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(out)));
20. while((str1 = br.readLine())!=null) {
21. str2 = str1.toLowerCase();
22. bw.write(str2, 0, str2.length());
23. bw.newLine();
24. }
25. br.close();
26. bw.close();
27. } catch(IOException e) {
28. e.printStackTrace();
29. }
30. }
31. }