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Java FieldPosition setBeginIndex()用法及代码示例


java.text.FieldPosition类的setBeginIndex()方法用于设置FieldPosition对象的起始字符的索引。

用法:

public void setBeginIndex(int index)

参数:此方法采用整数值索引作为FieldPosition对象起始字符的新索引。


返回值:此方法无返回值。

下面是说明setBeginIndex()方法的示例:

范例1:

// Java program to demonstrate 
// setBeginIndex() 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); 
  
            // setting begin index of FieldPosition Object 
            // using setBeginIndex() mehtod 
            pos.setBeginIndex(5); 
  
            // getting begin index of FieldPosition Object 
            int i = pos.getBeginIndex(); 
  
            // display result 
            System.out.println("begin index:- " + i); 
        } 
  
        catch (ClassCastException e) { 
  
            System.out.println("Exception thrown:" + e); 
        } 
    } 
}
输出:
begin index:- 5

范例2:

// Java program to demonstrate 
// setBeginIndex() 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); 
  
            // setting begin index of FieldPosition Object 
            // using setBeginIndex() mehtod 
            pos.setBeginIndex(10); 
  
            // getting begin index of FieldPosition Object 
            int i = pos.getBeginIndex(); 
  
            // display result 
            System.out.println("begin index:- " + i); 
        } 
  
        catch (ClassCastException e) { 
  
            System.out.println("Exception thrown:" + e); 
        } 
    } 
}
输出:
begin index:- 10

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



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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 setBeginIndex() 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。