Examples of com.ibm.icu.text.MessageFormat

com.ibm.icu.text.MessageFormat
ut, with different testArgs output: The disk "MyDisk" contains 0 file(s). output: The disk "MyDisk" contains 1 file(s). output: The disk "MyDisk" contains 1,273 file(s).
For more sophisticated patterns, you can use a ChoiceFormat to get output such as:
```
 MessageFormat form = new MessageFormat("The disk \"{1}\" contains {0}."); double[] filelimits = {0,1,2}; String[] filepart = {"no files","one file","{0,number} files"}; ChoiceFormat fileform = new ChoiceFormat(filelimits, filepart); form.setFormatByArgumentIndex(0, fileform); Object[] testArgs = {new Long(12373), "MyDisk"}; System.out.println(form.format(testArgs)); // output, with different testArgs output: The disk "MyDisk" contains no files. output: The disk "MyDisk" contains one file. output: The disk "MyDisk" contains 1,273 files. 
```
You can either do this programmatically, as in the above example, or by using a pattern (see {@link ChoiceFormat}for more information) as in:
```
 form.applyPattern( "There {0,choice,0#are no files|1#is one file|1<are {0,number,integer} files}."); 
```
Note: As we see above, the string produced by a ChoiceFormat in MessageFormat is treated specially; occurances of '{' are used to indicated subformats, and cause recursion. If you create both a MessageFormat and ChoiceFormat programmatically (instead of using the string patterns), then be careful not to produce a format that recurses on itself, which will cause an infinite loop.
When a single argument is parsed more than once in the string, the last match will be the final result of the parsing. For example,
```
 MessageFormat mf = new MessageFormat("{0,number,#.##}, {0,number,#.#}"); Object[] objs = {new Double(3.1415)}; String result = mf.format( objs ); // result now equals "3.14, 3.1" objs = null; objs = mf.parse(result, new ParsePosition(0)); // objs now equals {new Double(3.1)} 
```
Likewise, parsing with a MessageFormat object using patterns containing multiple occurances of the same argument would return the last match. For example,
```
 MessageFormat mf = new MessageFormat("{0}, {0}, {0}"); String forParsing = "x, y, z"; Object[] objs = mf.parse(forParsing, new ParsePosition(0)); // result now equals {new String("z")} 
```
Synchronization

Message formats are not synchronized. It is recommended to create separate format instances for each thread. If multiple threads access a format concurrently, it must be synchronized externally. @see java.util.Locale @see Format @see NumberFormat @see DecimalFormat @see ChoiceFormat @author Mark Davis @stable ICU 3.0

        //difference between the two param strings are that
        //in the first one, the param position is within the
        //length of the string without param while it is not so
        //in the other case.


        MessageFormat messageFormatter = new MessageFormat("");


        try {
            //Apply pattern with param and print the result
            messageFormatter.applyPattern(pattern[1]);
            Object[] paramArray = {new String("BUG"), new Date()};
            String tempBuffer = messageFormatter.format(paramArray);
            if (!tempBuffer.equals("Message with param:BUG"))
                errln("MessageFormat with one param test failed.");
            logln("Formatted with one extra param : " + tempBuffer);


            //Apply pattern without param and print the result
            messageFormatter.applyPattern(pattern[0]);
            tempBuffer = messageFormatter.format(null);
            if (!tempBuffer.equals("Message without param"))
                errln("MessageFormat with no param test failed.");
            logln("Formatted with no params : " + tempBuffer);


             tempBuffer = messageFormatter.format(paramArray);
             if (!tempBuffer.equals("Message without param"))
                errln("Formatted with arguments > subsitution failed. result = " + tempBuffer.toString());
             logln("Formatted with extra params : " + tempBuffer);
            //This statement gives an exception while formatting...
            //If we use pattern[1] for the message with param,

View Full Code Here

    /* @bug 4058973
     * MessageFormat.toPattern has weird rounding behavior.
     */
    public void Test4058973() {


        MessageFormat fmt = new MessageFormat("{0,choice,0#no files|1#one file|1< {0,number,integer} files}");
        String pat = fmt.toPattern();
        if (!pat.equals("{0,choice,0.0#no files|1.0#one file|1.0< {0,number,integer} files}")) {
            errln("MessageFormat.toPattern failed");
        }
    }

View Full Code Here

     */
    public void Test4031438() {
        String pattern1 = "Impossible {1} has occurred -- status code is {0} and message is {2}.";
        String pattern2 = "Double '' Quotes {0} test and quoted '{1}' test plus 'other {2} stuff'.";


        MessageFormat messageFormatter = new MessageFormat("");


        try {
            logln("Apply with pattern : " + pattern1);
            messageFormatter.applyPattern(pattern1);
            Object[] paramArray = {new Integer(7)};
            String tempBuffer = messageFormatter.format(paramArray);
            if (!tempBuffer.equals("Impossible {1} has occurred -- status code is 7 and message is {2}."))
                errln("Tests arguments < substitution failed");
            logln("Formatted with 7 : " + tempBuffer);
            ParsePosition status = new ParsePosition(0);
            Object[] objs = messageFormatter.parse(tempBuffer, status);
            if (objs[paramArray.length] != null)
                errln("Parse failed with more than expected arguments");
            for (int i = 0; i < objs.length; i++) {
                if (objs[i] != null && !objs[i].toString().equals(paramArray[i].toString())) {
                    errln("Parse failed on object " + objs[i] + " at index : " + i);
                }
            }
            tempBuffer = messageFormatter.format(null);
            if (!tempBuffer.equals("Impossible {1} has occurred -- status code is {0} and message is {2}."))
                errln("Tests with no arguments failed");
            logln("Formatted with null : " + tempBuffer);
            logln("Apply with pattern : " + pattern2);
            messageFormatter.applyPattern(pattern2);
            tempBuffer = messageFormatter.format(paramArray);
            if (!tempBuffer.equals("Double ' Quotes 7 test and quoted {1} test plus other {2} stuff."))
                errln("quote format test (w/ params) failed.");
            logln("Formatted with params : " + tempBuffer);
            tempBuffer = messageFormatter.format(null);
            if (!tempBuffer.equals("Double ' Quotes {0} test and quoted {1} test plus other {2} stuff."))
                errln("quote format test (w/ null) failed.");
            logln("Formatted with null : " + tempBuffer);
            logln("toPattern : " + messageFormatter.toPattern());
        } catch (Exception foo) {
            warnln("Exception when formatting in bug 4031438. "+foo.getMessage());
        }
    }

View Full Code Here

    {
        ParsePosition pos = new ParsePosition(0);
        if (pos.getErrorIndex() != -1) {
            errln("ParsePosition.getErrorIndex initialization failed.");
        }
        MessageFormat fmt = new MessageFormat("There are {0} apples growing on the {1} tree.");
        String str = new String("There is one apple growing on the peach tree.");
        Object[] objs = fmt.parse(str, pos);
        logln("unparsable string , should fail at " + pos.getErrorIndex());
        if (pos.getErrorIndex() == -1)
            errln("Bug 4052223 failed : parsing string " + str);
        pos.setErrorIndex(4);
        if (pos.getErrorIndex() != 4)

View Full Code Here

    /* @bug 4111739
     * MessageFormat is incorrectly serialized/deserialized.
     */
    public void Test4111739()
    {
        MessageFormat format1 = null;
        MessageFormat format2 = null;
        ObjectOutputStream ostream = null;
        ByteArrayOutputStream baos = null;
        ObjectInputStream istream = null;


        try {
            baos = new ByteArrayOutputStream();
            ostream = new ObjectOutputStream(baos);
        } catch(IOException e) {
            errln("Unexpected exception : " + e.getMessage());
            return;
        }


        try {
            format1 = new MessageFormat("pattern{0}");
            ostream.writeObject(format1);
            ostream.flush();


            byte bytes[] = baos.toByteArray();


            istream = new ObjectInputStream(new ByteArrayInputStream(bytes));
            format2 = (MessageFormat)istream.readObject();
        } catch(Exception e) {
            errln("Unexpected exception : " + e.getMessage());
        }


        if (!format1.equals(format2)) {
            errln("MessageFormats before and after serialization are not" +
                " equal\nformat1 = " + format1 + "(" + format1.toPattern() + ")\nformat2 = " +
                format2 + "(" + format2.toPattern() + ")");
        } else {
            logln("Serialization for MessageFormat is OK.");
        }
    }

View Full Code Here

     * MessageFormat.applyPattern allows illegal patterns.
     */
    public void Test4114743()
    {
        String originalPattern = "initial pattern";
        MessageFormat mf = new MessageFormat(originalPattern);
        try {
            String illegalPattern = "ab { '}' de";
            mf.applyPattern(illegalPattern);
            errln("illegal pattern: \"" + illegalPattern + "\"");
        } catch (IllegalArgumentException foo) {
            if (!originalPattern.equals(mf.toPattern()))
                errln("pattern after: \"" + mf.toPattern() + "\"");
        }
    }

View Full Code Here

     * MessageFormat.parse has different behavior in case of null.
     */
    public void Test4116444()
    {
        String[] patterns = {"", "one", "{0,date,short}"};
        MessageFormat mf = new MessageFormat("");


        for (int i = 0; i < patterns.length; i++) {
            String pattern = patterns[i];
            mf.applyPattern(pattern);
            try {
                Object[] array = mf.parse(null, new ParsePosition(0));
                logln("pattern: \"" + pattern + "\"");
                log(" parsedObjects: ");
                if (array != null) {
                    log("{");
                    for (int j = 0; j < array.length; j++) {

View Full Code Here

     * MessageFormat.format has undocumented behavior about empty format objects.
     */
    public void Test4114739()
    {


        MessageFormat mf = new MessageFormat("<{0}>");
        Object[] objs1 = null;
        Object[] objs2 = {};
        Object[] objs3 = {null};
        try {
            logln("pattern: \"" + mf.toPattern() + "\"");
            log("format(null) : ");
            logln("\"" + mf.format(objs1) + "\"");
            log("format({})   : ");
            logln("\"" + mf.format(objs2) + "\"");
            log("format({null}) :");
            logln("\"" + mf.format(objs3) + "\"");
        } catch (Exception e) {
            errln("Exception thrown for null argument tests.");
        }
    }

View Full Code Here

     * MessageFormat.applyPattern works wrong with illegal patterns.
     */
    public void Test4113018()
    {
        String originalPattern = "initial pattern";
        MessageFormat mf = new MessageFormat(originalPattern);
        String illegalPattern = "format: {0, xxxYYY}";
        logln("pattern before: \"" + mf.toPattern() + "\"");
        logln("illegal pattern: \"" + illegalPattern + "\"");
        try {
            mf.applyPattern(illegalPattern);
            errln("Should have thrown IllegalArgumentException for pattern : " + illegalPattern);
        } catch (IllegalArgumentException e) {
            if (!originalPattern.equals(mf.toPattern()))
                errln("pattern after: \"" + mf.toPattern() + "\"");
        }
    }

View Full Code Here

    /* @bug 4118592
     * MessageFormat.parse fails with ChoiceFormat.
     */
    public void Test4118592()
    {
        MessageFormat mf = new MessageFormat("");
        String pattern = "{0,choice,1#YES|2#NO}";
        String prefix = "";
        for (int i = 0; i < 5; i++) {
            String formatted = prefix + "YES";
            mf.applyPattern(prefix + pattern);
            prefix += "x";
            Object[] objs = mf.parse(formatted, new ParsePosition(0));
            logln(i + ". pattern :\"" + mf.toPattern() + "\"");
            log(" \"" + formatted + "\" parsed as ");
            if (objs == null) logln("  null");
            else logln("  " + objs[0]);
        }
    }

View Full Code Here

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Examples of com.ibm.icu.text.MessageFormat

Synchronization

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