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📜  Java中的 MessageFormat getFormats() 方法与示例

📅  最后修改于: 2022-05-13 01:55:06.419000             🧑  作者: Mango

Java中的 MessageFormat getFormats() 方法与示例

Java.text.MessageFormat类的getFormats()方法用于获取用于消息格式对象先前设置的模式的格式。
句法:

public Format[] getFormats()

参数:此方法不接受任何参数作为参数。
返回值:此方法返回用于消息格式对象中先前设置的模式的格式。
以下是说明getFormats()方法的示例:
示例 1:

Java
// Java program to demonstrate
// getFormats() method
 
import 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, date, #}, {0, number, #.##}, {0, time}");
 
        // display the result
        System.out.println("pattern : "
                           + mf.toPattern());
 
        // getting all format
        // used in MessageFormat Object
        // using getFormats() method
        Format[] formats = mf.getFormats();
 
        // display the result
        System.out.println("\nRequired Formats are : ");
        for (int i = 0; i < formats.length; i++)
            System.out.println(formats[i]);
    }
}


Java
// Java program to demonstrate
// getFormats() method
 
import 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("{1, number, integer}");
 
        // display the result
        System.out.println("pattern : "
                           + mf.toPattern());
 
        // getting all format
        // used in MessageFormat Object
        // using getFormats() method
        Format[] formats = mf.getFormats();
 
        // display the result
        System.out.println("\nRequired Formats are : ");
        for (int i = 0; i < formats.length; i++)
            System.out.println(formats[i]);
    }
}


输出:
pattern : {0, date, #}, {0, number, #0.##}, {0, time}

Required Formats are : 
java.text.SimpleDateFormat@23
java.text.DecimalFormat@674dc
java.text.SimpleDateFormat@8400729

示例 2:

Java

// Java program to demonstrate
// getFormats() method
 
import 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("{1, number, integer}");
 
        // display the result
        System.out.println("pattern : "
                           + mf.toPattern());
 
        // getting all format
        // used in MessageFormat Object
        // using getFormats() method
        Format[] formats = mf.getFormats();
 
        // display the result
        System.out.println("\nRequired Formats are : ");
        for (int i = 0; i < formats.length; i++)
            System.out.println(formats[i]);
    }
}
输出:
pattern : {1, number, integer}

Required Formats are : 
java.text.DecimalFormat@674dc

参考: https://docs.oracle.com/javase/9/docs/api/ Java/text/MessageFormat.html#getFormats–