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Java FieldPosition toString()用法及代码示例


java.text.FieldPosition类的toString()方法用于以字符串形式表示字段位置对象。

用法:

public String toString()

参数:此方法不接受任何参数作为参数。


返回值:此方法返回此FieldPosition对象的字符串表示形式。

下面是说明toString()方法的示例:

范例1:

// Java program to demonstrate 
// toString() method 
  
import java.text.*; 
import java.util.*; 
import java.io.*; 
  
public class GFG { 
    public static void main(String[] argv) 
    { 
        try { 
  
            // Creating and initializing 
            // new FieldPosition Object 
            FieldPosition pos 
                = new FieldPosition( 
                    MessageFormat.Field.ARGUMENT); 
  
            // getting the String representation 
            // of this FieldPosition Object 
            // using toString() method 
            String str = pos.toString(); 
  
            // display result 
            System.out.println("FieldPosition:- " + str); 
        } 
  
        catch (ClassCastException e) { 
  
            System.out.println("Exception thrown:" + e); 
        } 
    } 
}
输出:
FieldPosition:- java.text.FieldPosition[field=-1, attribute=java.text.MessageFormat$Field(message argument field), beginIndex=0, endIndex=0]

范例2:

// Java program to demonstrate 
// toString() method 
  
import java.text.*; 
import java.util.*; 
import java.io.*; 
  
public class GFG { 
    public static void main(String[] argv) 
    { 
        try { 
  
            // Creating and initializing 
            // new FieldPosition Object 
            FieldPosition pos 
                = new FieldPosition( 
                    DateFormat.Field.AM_PM); 
  
            // getting the String representation 
            // of this FieldPosition Object 
            // using toString() method 
            String str = pos.toString(); 
  
            // display result 
            System.out.println("FieldPosition:- " + str); 
        } 
  
        catch (ClassCastException e) { 
  
            System.out.println("Exception thrown:" + e); 
        } 
    } 
}
输出:
FieldPosition:- java.text.FieldPosition[field=-1, attribute=java.text.DateFormat$Field(am pm), beginIndex=0, endIndex=0]

参考: https://docs.oracle.com/javase/9/docs/api/java/text/FieldPosition.html#toString-



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注:本文由纯净天空筛选整理自RohitPrasad3大神的英文原创作品 FieldPosition toString() method in Java with Example。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。