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Java help needed for a code like Autocorrect

I am writing a program which is the opposite of Auto Correct. The logic is that the user enters a sentence, when a button is pressed, the grammatical opposite of the sentence entered by the user should be displayed. I am roughly able to get the code. I used the matcher logic.But i am not able to get the desired output. I am linking the code with this question. Can anyone help me please?
imageButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String input = editText.getText().toString();
String store = input;
String store1 [] = store.split(" ");
String correct[] = {"is","shall","this","can","will"};
String wrong [] = {"was","should","that","could","would"};
String output = "";
for (int i=0;i<store1.length;i++) {
for(int j=0;j<correct.length;j++){
if(store1[i].matches(correct[j])) {
output = input.replace(store1[i], wrong[j]);
//store1[i] = wrong[j];
}
else
{
input.replace(store1[i], store1[i]);
//store1[i] = store1[i];
}
}
mTextView.setText(output);
}
}});

By looking at your code, I've found some redundancy and unused variable. Shown as below.
String store = input;
String store1 [] = store.split(" ");
As shown below, I did some cleanup for you and implement your logic using Map interface. The wrong value must be the Key of the map so that we can easily determine is the word a wrong value using Map.containKeys(word). If key is found then we concatenate the output variable with the correct word.
String input = editText.getText().toString().split(" ");
Map<String, String> pairs = new HashMap<>();
pairs.put("is", "was");
pairs.put("shall", "should");
pairs.put("this", "that");
pairs.put("can", "could");
pairs.put("will", "would");
String output = "";
for (String word : input) {
if (pairs.containsKey(word)) {
output = output + pairs.get(word) + " ";
} else {
output = output + word + " ";
}
}
mTextView.setText(output.trim());

Java Split method strings into method name and argument

I am writing a small programming language for a game I am making, this language will be for allowing users to define their own spells for the wizard entity outside the internal game code. I have the language written down, but I'm not entirely sure how to change a string like
setSpellName("Fireball")
setSplashDamage(32,5)
into an array which would have the method name and the arguments after it, like
{"setSpellName","Fireball"}
{"setSplashDamage","32","5"}
How could I do this using java's String.split or string regex's?
Thanks in advance.

Since you're only interested in the function name and parameters I'd suggest scanning up to the first instance of ( and then to the last ) for the params, as so.
String input = "setSpellName(\"Fireball\")";
String functionName = input.substring(0, input.indexOf('('));
String[] params = input.substring(input.indexOf(')'), input.length - 1).split(",");

To capture the String
setSpellName("Fireball")
Do something like this:
String[] line = argument.split("(");
Gets you "setSpellName" at line[0] and "Fireball") at line[1]
Get rid of the last parentheses like this
line[1].replaceAll(")", " ").trim();
Build your JSON with the two "cleaned" Strings.
There's probably a better way with Regex, but this is the quick and dirty way.

With String.indexOf() and String.substring(), you can parse out the function and parameters. Once you parse them out, apply the quotes are around each of them. Then combine them all back together delimited by commas and wrapped in curly braces.
public static void main(String[] args) throws Exception {
List<String> commands = new ArrayList() {{
add("setSpellName(\"Fireball\")");
add("setSplashDamage(32,5)");
}};
for (String command : commands) {
int openParen = command.indexOf("(");
String function = String.format("\"%s\"", command.substring(0, openParen));
String[] parameters = command.substring(openParen + 1, command.indexOf(")")).split(",");
for (int i = 0; i < parameters.length; i++) {
// Surround parameter with double quotes
if (!parameters[i].startsWith("\"")) {
parameters[i] = String.format("\"%s\"", parameters[i]);
}
}
String combine = String.format("{%s,%s}", function, String.join(",", parameters));
System.out.println(combine);
}
}
Results:
{"setSpellName","Fireball"}
{"setSplashDamage","32","5"}

This is a solution using regex, use this Regex "([\\w]+)\\(\"?([\\w]+)\"?\\)":
String input = "setSpellName(\"Fireball\")";
String pattern = "([\\w]+)\\(\"?([\\w]+)\"?\\)";
Pattern r = Pattern.compile(pattern);
String[] matches;
Matcher m = r.matcher(input);
if (m.find()) {
System.out.println("Found value: " + m.group(1));
System.out.println("Found value: " + m.group(2));
String[] params = m.group(2).split(",");
if (params.length > 1) {
matches = new String[params.length + 1];
matches[0] = m.group(1);
System.out.println(params.length);
for (int i = 0; i < params.length; i++) {
matches[i + 1] = params[i];
}
System.out.println(String.join(" :: ", matches));
} else {
matches = new String[2];
matches[0] = m.group(1);
matches[1] = m.group(2);
System.out.println(String.join(", ", matches));
}
}
([\\w]+) is the first group to get the function name.
\\(\"?([\\w]+)\"?\\) is the second group to get the parameters.
This is a Working DEMO.

Split out array list into separate strings

I have created an array of values from my SQLite database - this comprises of just two values from two different columns from an inner joined table.
in my SQLDatabaseHelper.java:
public List<List<String>> getAllAnswersByQuestion1() {
List<String> array1 = new ArrayList<String>();
List<String> array2 = new ArrayList<String>();
SQLiteDatabase db = this.getReadableDatabase();
String selectQuery = "SELECT * FROM " + TABLE_ANSWERS + " ta, "
+ TABLE_QUESTION + " tq, " + TABLE_QUESTANS + " tqa WHERE ta." + ASID
+ " = " + "tqa." + ASID + " AND tq." + QID + " = "
+ "tqa." + QID;
Cursor c = db.rawQuery(selectQuery, null);
if (c.moveToFirst()) {
do {
String questdescr = c.getString(c.getColumnIndex(QDESCR));
String questid = c.getString(c.getColumnIndex(QID));
array1.add(questdescr);
array2.add(questid);
} while (c.moveToNext());
}
List< List<String> > listArray = new ArrayList< List<String> >();
listArray.add(array1);
listArray.add(array2);
return listArray;
}
I want to pass these to my main activity. Specifically I would like to split out the array into separate strings so I can assign those values to separate edittext fields.
This is my current attempt in my main activity:
public void showNextRandomQuestion()
{
SQLDatabaseHelper db = new SQLDatabaseHelper(this);
StringTokenizer tokens = new StringTokenizer(db.getAllAnswersByQuestion1(), ",");
String first = tokens.nextToken();
String second = tokens.nextToken();
questionView.setText(first);
answerText1.setText(second);
}
However the code will not compile as it wants to either 'change the return type of 'getAllAnswersByQuestion1() to string' - or 'Remove argument to match StingTokenizer(String)'
Can't seem to get around this.

for(List l : db.getAllAnswersByQuestion1()){
for(String s : l){
StringTokenizer tokens = new StringTokenizer(s, ",");
String first = tokens.nextToken();
String second = tokens.nextToken();
questionView.setText(first);
answerText1.setText(second);
}
}
this update will make your code work at least

It looks like you have both the question and answer stored in the QDESCR field, comma delimited.
If that is the case, then something like the code below would work.
I assume that you want to select a random question from the list, given the method name.
You can use Random in order to generate a random index of the list.
You might want to add logic to prevent previously selected questions from coming up again.
Here is the basic code that gets the question/answer, and question ID:
public void showNextRandomQuestion() {
//get the data from the database
List<List<String>> listList = db.getAllAnswersByQuestion1();
//Get the question/answer Strings and the question IDs
List<String> questionStrings = listList.get(0); //question and answer Strings
List<String> questionIDs = listList.get(1); //question IDs
//Generate random index
Random r = new Random();
int rand = Math.abs((r.nextInt() % questionStrings.size()));
//get question ID for randomly selected question
String questionID = questionIDs.get(rand);
//Separate out the question/answer of randomly selected question
StringTokenizer tokens = new StringTokenizer(questionStrings.get(rand), ",");
String first = tokens.nextToken();
String second = tokens.nextToken();
questionView.setText(first);
answerText1.setText(second);
}
Also, note that it would be better to use String.split(), as is stated in the documentation.

Best way to split a string containing question marks and equals

Having an issue where I have a java string:
String aString="name==p==?header=hello?aname=?????lname=lastname";
I need to split on question marks followed by equals.
The result should be key/value pairs:
name = "=p=="
header = "hello"
aname = "????"
lname = "lastname"
The problem is aname and lname become:
name = ""
lname = "????lname=lastname"
My code simply splits by doing aString.split("\\?",2)
which will return 2 strings.One contains a key/value pair and the second string contains
the rest of the string. If I find a question mark in the string, I recurse on the second string to further break it down.
private String split(String aString)
{
System.out.println("Split: " + aString);
String[] vals = aString.split("\\?",2);
System.out.println(" - Found: " + vals.length);
for ( int c = 0;c<vals.length;c++ )
{
System.out.println(" - "+ c + "| String: [" + vals[c] + "]" );
if(vals[c].indexOf("?") > 0 )
{
split(vals[c]);
}
}
return ""; // For now return nothing...
}
Any ideas how I could allow a name of ?
Disclaimer: Yes , My Regex skills are very low, so I don't know if this could be done via a regex expression.

You can let regex do all the heavy lifting, first splitting your string up into pairs:
String[] pairs = aString.split("\\?(?!\\?)");
That regex means "a ? not followed by a ?", which gives:
[name==p==, header=hello, aname=????, lname=lastname]
To then also split the results into name/value, split only the first "=":
String[] split = pair.split("=", 2); // max 2 parts
Putting it all together:
String aString = "name==p==?header=hello?aname=?????lname=lastname";
for (String pair : aString.split("\\?(?!\\?)")) {
String[] split = pair.split("=", 2);
System.out.println(split[0] + " is " + split[1]);
}
Output:
name is =p==
header is hello
aname is ????
lname is lastname

You can try like this
String[] vals = "Hello??Man?HowAreYou????".split("\\?+");
System.out.println(vals[0]+vals[1]+vals[2]);
OUTPUT
HelloManHowAreYou
But as aname=????? you want to get you can replace the
????? Five Question Marks with Other Symbol and replace back to ????? after split
String processed="Hello????Good? ? ....???".replace("????","*");
OUTPUT
Hello*Good? ? ....???
And than use split for ?

Here the code, you are looking .
Implemented using the Split and HashMap.
Tested and Executed.
import java.util.HashMap;
import java.util.Map;
public class Sample {
public static void main(String[] args) {
// TODO Auto-generated method stub
// String[] vals = "Hello??Man?HowAreYou????".split("\\?+");
// System.out.println(vals[0]+vals[1]+vals[2]);
String query="name==p==?header=hello?aname=?????lname=lastname";
String[] params = query.split("\\?");
Map<String, String> map = new HashMap<String, String>();
for (String param : params)
{
String name = param.split("=")[0];
String value = param.substring(name.length(),param.length());
map.put(name, value);
System.out.println(name);
if(name.equals("")){
value+="?";
}
System.out.println(value.replaceAll(" ", ""));
}
}
}

I assume you are parsing URLs. The correct way would be to encode all special characters like ?, & and = which are values or names.
Better Solution: Encoding characters:
String name = "=p==";
String aname = "aname=????";
String lname = "lastname";
String url = "name=" + URLEncoder.encode(name, "UTF-8") +
"?aname=" + URLEncoder.encode(aname, "UTF-8") +
"?lname=" + URLEncoder.encode(lname, "UTF-8");
After that you have something like this:
name==p==?aname=?????lname=lastname
This can be splitted and decoded easily.
Other Solution: Bad input parsing:
If you insist, this works also. You can use a regex:
Pattern pattern = Pattern.compile("(\\w+?)=(\\S+?\\?+)");
Matcher m = pattern.matcher(query + "?");
while (m.find()) {
String key = m.group(1);
String value = m.group(2);
value = value.substring(0, value.length() - 1);
System.out.println(key + " = " +value);
}

Android - Editing my String so each word starts with a capital

I was wondering if someone could provide me some code or point me towards a tutrial which explain how I can convert my string so that each word begins with a capital.
I would also like to convert a different string in italics.
Basically, what my app is doing is getting data from several EditText boxes and then on a button click is being pushed onto the next page via intent and being concatenated into 1 paragraph. Therefore, I assume I need to edit my string on the intial page and make sure it is passed through in the same format.
Thanks in advance

You can use Apache StringUtils. The capitalize method will do the work.
For eg:
WordUtils.capitalize("i am FINE") = "I Am FINE"
or
WordUtils.capitalizeFully("i am FINE") = "I Am Fine"

Here is a simple function
public static String capEachWord(String source){
String result = "";
String[] splitString = source.split(" ");
for(String target : splitString){
result
+= Character.toUpperCase(target.charAt(0))
+ target.substring(1) + " ";
}
return result.trim();
}

The easiest way to do this is using simple Java built-in functions.
Try something like the following (method names may not be exactly right, doing it off the top of my head):
String label = Capitalize("this is my test string");
public String Capitalize(String testString)
{
String[] brokenString = testString.split(" ");
String newString = "";
for(String s : brokenString)
{
s.charAt(0) = s.charAt(0).toUpper();
newString += s + " ";
}
return newString;
}
Give this a try, let me know if it works for you.

Just add android:inputType="textCapWords" to your EditText in layout xml. This wll make all the words start with the Caps letter.

Strings are immutable in Java, and String.charAt returns a value, not a reference that you can set (like in C++). Pheonixblade9's will not compile. This does what Pheonixblade9 suggests, except it compiles.
public String capitalize(String testString) {
String[] brokenString = testString.split(" ");
String newString = "";
for (String s : brokenString) {
char[] chars = s.toCharArray();
chars[0] = Character.toUpperCase(chars[0]);
newString = newString + new String(chars) + " ";
}
//the trim removes trailing whitespace
return newString.trim();
}

String source = "hello good old world";
StringBuilder res = new StringBuilder();
String[] strArr = source.split(" ");
for (String str : strArr) {
char[] stringArray = str.trim().toCharArray();
stringArray[0] = Character.toUpperCase(stringArray[0]);
str = new String(stringArray);
res.append(str).append(" ");
}
System.out.print("Result: " + res.toString().trim());