The applyPattern() method of java.text.MessageFormat class is used to set the new pattern text for current MessageFormat by overriding the current FormatElement, FormatType and FormatStyle. Syntax:
public void applyPattern(String newPattern)
Parameter: This method takes string newPattern as parameter which is the new text pattern for this MessageFormat object. Return Value: This method returns nothing. Exception: This method throws NullPointerException if the specified newPattern is null. Below are the examples to illustrate the applyPattern() method: Example 1:
Java
// Java program to demonstrate// applyPattern() methodimport java.text.*;import java.util.*;import java.io.*;public class GFG { public static void main(String[] argv) { // creating and initializing MessageFormat MessageFormat mf = new MessageFormat("{0, number, #}, {0, number, #.##}, {0, number}"); // display the result System.out.println("old pattern : " + mf.toPattern()); // applying new string pattern // to this MessageFormat Object // using applyPattern() method mf.applyPattern("{0, time, #}"); // display the result System.out.println("\nnew pattern : " + mf.toPattern()); }} |
Output:
old pattern : {0, number, #}, {0, number, #0.##}, {0, number}
new pattern : {0, date, #}
Example 2:
Java
// Java program to demonstrate// applyPattern() methodimport java.text.*;import java.util.*;import java.io.*;public class GFG { public static void main(String[] argv) { try { // creating and initializing MessageFormat MessageFormat mf = new MessageFormat("{0, date, #}, {1, time, #}, {0, number}"); // display the result System.out.println("old pattern : " + mf.toPattern()); // applying new string pattern // to this MessageFormat Object // using applyPattern() method mf.applyPattern(null); // display the result System.out.println("\nnew pattern : " + mf.toPattern()); } catch (NullPointerException e) { System.out.println("\nString is Null"); System.out.println("Exception thrown : " + e); } }} |
Output:
old pattern : {0, date, #}, {1, date, #}, {0, number}
String is Null
Exception thrown : java.lang.NullPointerException
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