Java Utililty Methods Scanner Usage

Scanner scanner = new Scanner(source);
scanner.useDelimiter(separator);
List<String> list = new ArrayList<String>();
while (scanner.hasNext()) {
    list.add(scanner.next());
return list;

int warnings = 0;
Scanner scanner = new Scanner(compilerResult);
while (scanner.hasNextLine()) {
    if (scanner.nextLine().contains("warning")) {
        warnings++;
return warnings;
...

StringBuffer output = new StringBuffer();
Scanner scanner = new Scanner(input);
while (scanner.hasNextLine()) {
    String line = scanner.nextLine();
    line = line.replaceAll("\t", " ");
    while (line.contains("  ")) {
        line = line.replaceAll("  ", " ");
    line = line.trim();
    if (line.length() > 0) {
        output.append(line);
        output.append("\n");
return output.toString();

Scanner keyboardScanner = getThreadScanner();
if (keyboardScanner != null) {
    keyboardScanner.close();
    keyboardScanner = null;

String a = in.nextLine();
String b = in.nextLine();
boolean[] marked = new boolean[26];
for (char c : a.toCharArray()) {
    int pos = c - 97;
    marked[pos] = true;
for (char c : b.toCharArray()) {
...

int[][] matrix = new int[n][n];
int xSum = 0;
for (int x = 0; x < n; x++) {
    xSum += in.nextInt();
    matrix[x][0] = xSum;
for (int y = 1; y < n; y++) {
    xSum = 0;
...

System.out.print(message + " (yes/no): ");
String answer = in.nextLine().toLowerCase().trim();
if (answer.equals("yes") || answer.equals("y"))
    return true;
else if (answer.equals("no") || answer.equals("n"))
    return false;
return confirm(message);

out(NEW_LINE, message + " (Y/N): ");
String response = scanner.nextLine();
return response != null && response.trim().toUpperCase().equals("Y");

System.out.println(warning);
System.out.print("Are you sure you want to do this? (yes/no): ");
Scanner in = new Scanner(System.in);
while (true) {
    try {
        String input = in.nextLine();
        if ("yes".equals(input)) {
            return true;
...

int count = 0;
while (fin.hasNext()) {
    count++;
    fin.nextLine();
return count;