Java中的 ParsePosition getErrorIndex() 方法与示例

Java.text.ParsePosition类的getErrorIndex()方法用于检索可能发生解析错误的索引。

句法：

public int getErrorIndex()

参数：此方法不接受任何参数作为参数。

返回值：此方法返回可能发生解析错误的索引。

以下是说明getErrorIndex()方法的示例：

示例 1：

// Java program to demonstrate
// getErrorIndex() 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(0);
  
            // set index for the parsing error
            pos.setErrorIndex(3);
  
            // getting index at which
            // parsing error may come
            // using getErrorIndex() method
            int i = pos.getErrorIndex();
  
            // display result
            System.out.println(
                "index at which parse error may occur: "
                + Integer.toString(i));
        }
  
        catch (ClassCastException e) {
  
            System.out.println(e);
        }
    }
}

输出：

index at which parse error may occur: 3

示例 2：

// Java program to demonstrate
// getErrorIndex() 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(0);
  
            // getting index at which
            // parsing error may come
            // using getErrorIndex() method
            int i = pos.getErrorIndex();
  
            // display result
            if (i != -1)
                System.out.println(
                    "index at which parse error may occur: "
                    + Integer.toString(i));
            else
                System.out.println("error index is not set");
        }
  
        catch (ClassCastException e) {
  
            System.out.println(e);
        }
    }
}

输出：

error index is not set

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