Java NumberFormat equals()用法及代碼示例

equals()方法是java.text.NumberFormat的內置方法，接受作為對象的參數，如果該參數對象與該對象相同，則返回true，否則返回false。

用法：

public boolean equals(Object arg)

參數：該函數接受單個強製參數arg，該參數指定要與之進行比較的對象。

返回值：該函數返回一個布爾值。如果兩個對象相同，則返回true，否則返回false。

下麵是上述函數的實現：

示例1:

// Java program to implement 
// the above function 
import java.text.NumberFormat; 
  
public class Main { 
    public static void main(String[] args) 
        throws Exception 
    { 
  
        // Get the Currency Instance 
        NumberFormat nF1 
            = NumberFormat 
                  .getCurrencyInstance(); 
  
        // Get the Currency Instance 
        NumberFormat nF2 
            = NumberFormat 
                  .getCurrencyInstance(); 
  
        // Check if equal or not 
        if (nF1.equals(nF2)) 
            System.out.println("Yes both are equal"); 
        else
            System.out.println("Yes both are not equal"); 
    } 
}

輸出：

Yes both are equal

示例2:

// Java program to implement 
// the above function 
import java.text.NumberFormat; 
  
public class Main { 
    public static void main(String[] args) 
        throws Exception 
    { 
  
        // Get the Currency Instance 
        NumberFormat nF1 
            = NumberFormat 
                  .getCurrencyInstance(); 
  
        // Get the Instance 
        NumberFormat nF2 
            = NumberFormat 
                  .getInstance(); 
  
        // Check if equal or not 
        if (nF1.equals(nF2)) 
            System.out.println("Yes both are equal"); 
        else
            System.out.println("both are not equal"); 
    } 
}

輸出：

both are not equal

參考： https://docs.oracle.com/javase/10/docs/api/java/text/NumberFormat.html#equals(java.lang.Object)

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