Java FieldPosition equals()用法及代碼示例

java.text.FieldPosition類的equals()方法用於檢查兩個FieldPosition對象是否相同。

用法:

public boolean equals(Object obj)

參數：此方法采用FieldPosition對象，該對象將與當前FieldPosition對象進行比較。

返回值：如果兩個FieldPosition對象彼此相等，則它將返回true，否則返回false。

下麵是說明equals()方法的示例：

範例1：

// Java program to demonstrate 
// equals() 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_1 
                = new FieldPosition( 
                    DateFormat.Field.AM_PM); 
  
            // Creating and initializing 
            // new FieldPosition Object 
            FieldPosition pos_2 
                = new FieldPosition( 
                    DateFormat.Field.AM_PM); 
  
            // compare both object 
            // using equals() mehtod 
            boolean i = pos_1.equals(pos_2); 
  
            // display result 
            if (i) 
                System.out.println( 
                    "pos_1 is equals to pos_2"); 
            else
                System.out.println( 
                    "pos_1 is not equal to pos_2"); 
        } 
  
        catch (ClassCastException e) { 
  
            System.out.println("Exception thrown:" + e); 
        } 
    } 
}

輸出：

pos_1 is equals to pos_2

範例2：

// Java program to demonstrate 
// equals() 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_1 
                = new FieldPosition( 
                    DateFormat.Field.AM_PM); 
  
            // Creating and initializing 
            // new FieldPosition Object 
            FieldPosition pos_2 
                = new FieldPosition( 
                    MessageFormat.Field.ARGUMENT); 
  
            // compare both object 
            // using equals() mehtod 
            boolean i = pos_1.equals(pos_2); 
  
            // display result 
            if (i) 
                System.out.println( 
                    "pos_1 is equals to pos_2"); 
            else
                System.out.println( 
                    "pos_1 is not equal to pos_2"); 
        } 
  
        catch (ClassCastException e) { 
  
            System.out.println("Exception thrown:" + e); 
        } 
    } 
}

輸出：

pos_1 is not equal to pos_2

參考： https://docs.oracle.com/javase/9/docs/api/java/text/FieldPosition.html#equals-java.lang.Object-

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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 equals() 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。