解析 Java 中的 getIndex()方法,示例

原文:https://www . geesforgeks . org/parse position-getindex-method-in-Java-with-example/

java.text.ParsePosition 类的 getIndex() 方法用于检索这个 ParsePosition 对象的当前解析位置。

语法:

public int getIndex()

参数:该方法不接受任何参数作为参数。

返回值:该方法返回该解析位置对象的当前解析位置

以下是说明 getIndex() 方法的示例:

例 1:

// Java program to demonstrate
// getIndex() 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 the parsing error
            pos.setErrorIndex(3);

            // getting the current
            // ParsePosition of
            // using getIndex() method
            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: 1

例 2:

// Java program to demonstrate
// getIndex() 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
            pos.setIndex(3);

            // getting the current
            // ParsePosition of
            // using getIndex() method
            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

参考:https://docs . Oracle . com/javase/9/docs/API/Java/text/parseposition . html # getIndex–