MessageFormat setFormat() method in Java with Example
Last Updated :
22 Jan, 2020
The setFormats() method of java.text.MessageFormat class is used to set the new format element at the particular index in the pattern of this message format object.
Syntax:
public void setFormat(int formatElementIndex,
Format newFormat)
Parameters: This method takes the following argument as a parameter:
- formatElementIndex: this is the particular index where new format element is going to be placed.
- newFormat: this is the new Format element which is going to be placed.
Return Value: This method has nothing to return.
Exception : This method throws ArrayIndexOutOfBoundsException if the formatElementIndex is out of bound.
Below are the examples to illustrate the setFormat() method:
Example 1:
import java.text.*;
import java.util.*;
import java.io.*;
public class GFG {
public static void main(String[] argv)
{
MessageFormat mf
= new MessageFormat( "{0, date, #}, {0, number, #.##}, {0, time}" );
System.out.println( "old pattern : "
+ mf.toPattern());
Format[] formats = mf.getFormats();
for ( int i = 0 ; i < formats.length; i++)
mf.setFormat(i, formats[ 1 ]);
System.out.println( "\nnew pattern : "
+ mf.toPattern());
}
}
|
Output:
old pattern : {0,date, #}, {0,number, #0.##}, {0,time}
new pattern : {0,number, #0.##}, {0,number, #0.##}, {0,number, #0.##}
Example 2:
import java.text.*;
import java.util.*;
import java.io.*;
public class GFG {
public static void main(String[] argv)
{
try {
MessageFormat mf
= new MessageFormat( "{0, date, #}, {0, number, #.##}, {0, time}" );
System.out.println( "old pattern : "
+ mf.toPattern());
Format[] formats = mf.getFormats();
for ( int i = 0 ; i <= formats.length + 1 ; i++)
mf.setFormat(- 1 , formats[ 1 ]);
System.out.println( "\nnew pattern : "
+ mf.toPattern());
}
catch (ArrayIndexOutOfBoundsException e) {
System.out.println( "\narray is out of bound" );
System.out.println( "Exception thrown : " + e);
}
}
}
|
Output:
old pattern : {0,date, #}, {0,number, #0.##}, {0,time}
array is out of bound
Exception thrown : java.lang.ArrayIndexOutOfBoundsException: -1
Reference: https://docs.oracle.com/javase/9/docs/api/java/text/MessageFormat.html#setFormat-int-java.text.Format-
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