Java Utililty Methods Scanner Usage

List of utility methods to do Scanner Usage

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Description

The list of methods to do Scanner Usage are organized into topic(s).

Method

voidprocessLine(String aLine)
process Line 
Scanner scanner = new Scanner(aLine);
scanner.useDelimiter("=");
if (scanner.hasNext()) {
    String name = (scanner.next()).trim();
    String value = (scanner.next()).trim();
    if (name.equals("IPv4AddrShow")) {
        if (value.equals("n"))
            ipv4AddrShow = false;
...
intqueryMenu(Scanner in, String msg, LinkedList options)
query Menu 
System.out.printf("%s\n", msg); 
while (true) {
    int idx = 0;
    for (String option : options) {
        System.out.printf("\t%d. %s\n", idx, option);
        idx++;
    System.out.printf("Enter an option from the list above: ");
...
StringqueryStr(Scanner in, String msg)
query Str 
System.out.printf("%s", msg);
String response = in.nextLine();
if (response.length() == 0) {
    System.out.printf("Please enter a valid string!\n");
return response;
StringremoveFirstNLines(String text, int n)
remove First N Lines 
Scanner scanner = new Scanner(text);
int i = 0;
while (scanner.hasNextLine() && i < n) {
    scanner.nextLine();
    i++;
String result = "";
while (scanner.hasNextLine()) {
...
StringremoveIndexes(String xpath)
Remove indexes from an xpath string. 
final String[] partialSteps = xpath.split("[/]");
if (partialSteps.length == 0) {
    return xpath;
int startIndex = 0;
StringBuffer buf = new StringBuffer();
for (int i = startIndex; i < partialSteps.length; i++) {
    String step = partialSteps[i];
...
StringremoveNLinesForwardsFromStringMatch(String text, String match, int n)
Removes the first n lines within a plain text from the position where the search string is located, inclusive. 
Scanner scanner = new Scanner(text);
String line = null, result = "";
while (scanner.hasNextLine()) {
    line = scanner.nextLine();
    if (line.matches("(" + match + ").*")) {
        int i = 0;
        while (scanner.hasNextLine() && i < n) {
            scanner.nextLine();
...
StringselectProject(List projectList)
select Project 
if (projectList == null || projectList.isEmpty()) {
    return null;
System.out.println("Gerrit Projects:");
for (int i = 0; i < projectList.size(); i++) {
    System.out.println("[" + i + "] " + projectList.get(i));
System.out.print("Number of project to be deleted? [-1 to quit] ");
...
ListsplitLines(String string)
split Lines 
List<String> lines = new ArrayList<String>();
Scanner scanner = new Scanner(string);
while (scanner.hasNextLine()) {
    lines.add(scanner.nextLine());
return lines;
double[]splitToDouble(String input)
split To Double 
Scanner s = new Scanner(input);
s.useDelimiter("(,|;)\\s*");
List<Double> values = new ArrayList<Double>();
while (s.hasNext()) {
    if (s.hasNextDouble()) {
        values.add(s.nextDouble());
    } else {
        s.next();
...
double[]stringToArray(String str)
string To Array 
Scanner scn = new Scanner(str);
scn.useLocale(Locale.ENGLISH);
int length = 0;
while (scn.hasNextDouble()) {
    length++;
    scn.nextDouble();
scn.close();
...