Java Utililty Methods Text File Write

OutputStreamWriter out = new OutputStreamWriter(new FileOutputStream(file), "UTF-8");
char[] chars = str.toCharArray();
out.write(chars, 0, chars.length);
out.close();

try {
    BufferedReader in4 = new BufferedReader(new StringReader(str));
    PrintWriter out1 = new PrintWriter(new BufferedWriter(new FileWriter(file)));
    String tempStr = null;
    while ((tempStr = in4.readLine()) != null) {
        out1.println(tempStr);
    out1.close();
...

try {
    BufferedWriter output = new BufferedWriter(new FileWriter(file));
    output.write(str);
    output.flush();
    output.close();
} catch (IOException e) {
    e.printStackTrace();

PrintWriter tmpASP;
try {
    tmpASP = new PrintWriter(filePath);
    tmpASP.print(str);
    tmpASP.close();
} catch (FileNotFoundException e) {
    e.printStackTrace();

File file = new File(filePath);
try {
    BufferedWriter out = new BufferedWriter(new FileWriter(file, false));
    out.write(str);
    out.close();
} catch (IOException e) {
    e.printStackTrace();

try {
    final FileOutputStream fos = new FileOutputStream(destFile.getAbsoluteFile());
    final BufferedWriter bw = new BufferedWriter(new PrintWriter(fos));
    bw.write(string);
    bw.flush();
    bw.close();
    fos.close(); 
} catch (FileNotFoundException e) {
...

try (BufferedWriter bufferedwriter = new BufferedWriter(new FileWriter(dstFile));) {
    bufferedwriter.write(string);
} catch (FileNotFoundException e) {
    throw new RuntimeException("Filed does not exist " + dstFile.getAbsolutePath()); 
} catch (IOException e) {
    throw new RuntimeException("Could not write to file " + dstFile.getAbsolutePath()); 

try {
    BufferedWriter writer = new BufferedWriter(new FileWriter(file));
    writer.write(string);
    writer.close();
} catch (IOException e) {

FileWriter fw = new FileWriter(file);
fw.append(string);
fw.close();

try (OutputStreamWriter writer = new OutputStreamWriter(new FileOutputStream(file), "UTF-8")) {
    writer.write(string);
return file;