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Java FieldPosition setBeginIndex()用法及代碼示例


java.text.FieldPosition類的setBeginIndex()方法用於設置FieldPosition對象的起始字符的索引。

用法:

public void setBeginIndex(int index)

參數:此方法采用整數值索引作為FieldPosition對象起始字符的新索引。


返回值:此方法無返回值。

下麵是說明setBeginIndex()方法的示例:

範例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); 
        } 
    } 
}
輸出:
begin index:- 5

範例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); 
        } 
    } 
}
輸出:
begin index:- 10

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



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注:本文由純淨天空篩選整理自RohitPrasad3大神的英文原創作品 FieldPosition setBeginIndex() method in Java with Example。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。