Java中的 ParsePosition setIndex() 方法与示例

Java.text.ParsePosition类的setIndex()方法用于设置这个 ParsePositon 对象的当前解析位置。

句法：

public void setIndex(int index)

参数：此方法采用整数索引，当前解析位置将被设置。

返回值：此方法没有任何返回值。

以下是说明setIndex()方法的示例：

示例 1：

// Java program to demonstrate
// setIndex() method
  
import java.text.*;
import java.util.*;
import java.io.*;
  
public class GFG {
    public static void main(String[] argv)
    {
        try {
  
            // Creating and initializing
            // new ParsePosition Object
            ParsePosition pos
                = new ParsePosition(1);
  
            // set index for current
            // Parse Position object
            // using setIndex() method
            pos.setIndex(3);
  
            // getting the current
            // ParsePosition of
            int i = pos.getIndex();
  
            // display result
            System.out.println(
                "current parse position: "
                + Integer.toString(i));
        }
  
        catch (ClassCastException e) {
  
            System.out.println(e);
        }
    }
}

输出：

current parse position: 3

示例 2：

// Java program to demonstrate
// setIndex() method
  
import java.text.*;
import java.util.*;
import java.io.*;
  
public class GFG {
    public static void main(String[] argv)
    {
        try {
  
            // Creating and initializing
            // new ParsePosition Object
            ParsePosition pos
                = new ParsePosition(500);
  
            // set index for current
            // Parse Position object
            // using setIndex() method
            pos.setIndex(30);
  
            // getting the current
            // ParsePosition of
            int i = pos.getIndex();
  
            // display result
            System.out.println(
                "current parse position: "
                + Integer.toString(i));
        }
  
        catch (ClassCastException e) {
  
            System.out.println(e);
        }
    }
}

输出：

current parse position: 30

参考： https://docs.oracle.com/javase/9/docs/api/ Java/text/ParsePosition.html#setIndex-int-