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


    /*
     * Test method for 'com.ibm.icu.text.MessageFormat.toPattern()'
     */
    public void testToPattern() {
        MessageFormat mf = new MessageFormat(altPattern);
        assertEquals(pattern, mf.toPattern());
    }

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     */
    public void testSetFormats() {
        // this api, while it has the problem that the order of formats depends
        // on the order in the string, at least lets you set all the formats.
        
        MessageFormat mf = new MessageFormat(pattern, Locale.US);
        Format[] formats = {
            NumberFormat.getIntegerInstance(),
            DateFormat.getTimeInstance(DateFormat.SHORT),
            DateFormat.getDateInstance(),
        };
        mf.setFormats(formats);
        assertEquals(englishTarget, mf.format(args));
   }

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    /*
     * Test method for 'com.ibm.icu.text.MessageFormat.setFormat(int, Format)'
     */
    public void testSetFormat() {
        // and ok again        
        MessageFormat mf = new MessageFormat(pattern, Locale.US);
        mf.setFormat(1, DateFormat.getTimeInstance(DateFormat.LONG));
        assertEquals(modifiedTarget, mf.format(args));
    }

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    /*
     * Test method for 'com.ibm.icu.text.MessageFormat.getFormats()'
     */
    public void testGetFormats() {
        MessageFormat mf = new MessageFormat(pattern, Locale.US);
        Format[] formats = mf.getFormats();
        NumberFormat nf = NumberFormat.getNumberInstance(Locale.US);
        assertEquals(formats[0], nf);
        DateFormat tf = DateFormat.getTimeInstance(DateFormat.SHORT, Locale.US);
        assertEquals(formats[1], tf);
        DateFormat df = DateFormat.getDateInstance(DateFormat.DEFAULT, Locale.US);

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    /*
     * Test method for 'com.ibm.icu.text.MessageFormat.format(Object[], StringBuffer, FieldPosition)'
     */
    public void testFormatObjectArrayStringBufferFieldPosition() {
        MessageFormat mf = new MessageFormat(pattern, Locale.US);
        StringBuffer buf = new StringBuffer();
        FieldPosition fp = new FieldPosition(0);
        mf.format(args, buf, fp);
        assertEquals(englishTarget, buf.toString());
    }

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    /*
     * Test method for 'com.ibm.icu.text.MessageFormat.format(Object, StringBuffer, FieldPosition)'
     */
    public void testFormatObjectStringBufferFieldPosition() {
        MessageFormat mf = new MessageFormat(pattern, Locale.US);
        StringBuffer buf = new StringBuffer();
        FieldPosition fp = new FieldPosition(0);
        mf.format((Object)args, buf, fp);
        assertEquals(englishTarget, buf.toString());
    }

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    /*
     * Test method for 'com.ibm.icu.text.MessageFormat.parse(String, ParsePosition)'
     */
    public void testParseStringParsePosition() {
        MessageFormat mf = new MessageFormat(pattern, Locale.US);
        ParsePosition pp = new ParsePosition(1);
        Object[] result = mf.parse("!" + englishTarget, pp);
        assertEquals(num, result[0]);
        assertEquals(dateOnly, result[1]);
    }

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    /*
     * Test method for 'com.ibm.icu.text.MessageFormat.parse(String)'
     */
    public void testParseString() {
        MessageFormat mf = new MessageFormat(pattern, Locale.US);
        try {
            Object[] result = mf.parse(englishTarget);
            assertEquals(num, result[0]);
            assertEquals(dateOnly, result[1]);
        }
        catch (ParseException e) {
            fail(e.getMessage());

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    /*
     * Test method for 'com.ibm.icu.text.MessageFormat.parseObject(String, ParsePosition)'
     */
    public void testParseObjectStringParsePosition() {
        MessageFormat mf = new MessageFormat(pattern, Locale.US);
        ParsePosition pp = new ParsePosition(0);
        Object result = mf.parseObject(englishTarget, pp);
        assertEquals(num, ((Object[])result)[0]);
        assertEquals(dateOnly, ((Object[])result)[1]);
    }

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     * Test method for 'com.ibm.icu.text.MessageFormat.autoQuoteApostrophe(String)'
     */
    public void testAutoQuoteApostrophe() {
        String str = "Let's meet at {1,time,h 'o'' clock'} at l'Orange Bleue";
        String pat = MessageFormat.autoQuoteApostrophe(str);
        MessageFormat mf = new MessageFormat(pat, Locale.US);
        String result = mf.format(args);
        assertEquals("Let's meet at 8 o' clock at l'Orange Bleue", result);
        assertEquals("Let''s meet at {1,time,h 'o'' clock'} at l''Orange Bleue", pat);
    }

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Examples of com.ibm.icu.text.MessageFormat

Synchronization

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