Java MessageFormat equals()用法及代码示例

java.text.MessageFormat类的equals()方法用于检查两个MessageFormat对象是否相同。

用法:

public boolean equals(Object obj)

参数：此方法采用MessageFormat对象，该对象将与当前MessageFormat对象进行比较。

返回值：如果两个MessageFormat对象彼此相等，则它将返回true，否则返回false。

下面是说明equals()方法的示例：

范例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  MessageFormat 
            MessageFormat mf1 
                = new MessageFormat("{0, date, #}, {1, time, #}, {0, number}"); 
  
            // creating and initializing  MessageFormat 
            MessageFormat mf2 
                = new MessageFormat("{0, date, #}, {1, time, #}, {0, number}"); 
  
            // compare both object 
            // using equals() mehtod 
            boolean i = mf1.equals(mf2); 
  
            // display result 
            if (i) 
                System.out.println( 
                    "mf1 is equals to mf2"); 
            else
                System.out.println( 
                    "mf1 is not equal to mf2"); 
        } 
  
        catch (ClassCastException e) { 
  
            System.out.println("Exception thrown:" + e); 
        } 
    } 
}

输出：

mf1 is equals to mf2

范例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  MessageFormat 
            MessageFormat mf1 
                = new MessageFormat("{0, date, #}, {1, time, #}, {0, number}"); 
  
            // creating and initializing  MessageFormat 
            MessageFormat mf2 
                = new MessageFormat("{0, date, #}, {0, time, #}, {0, number}"); 
  
            // compare both object 
            // using equals() mehtod 
            boolean i = mf1.equals(mf2); 
  
            // display result 
            if (i) 
                System.out.println( 
                    "mf1 is equals to mf2"); 
            else
                System.out.println( 
                    "mf1 is not equal to mf2"); 
        } 
  
        catch (ClassCastException e) { 
  
            System.out.println("Exception thrown:" + e); 
        } 
    } 
}

输出：

mf1 is not equal to mf2

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

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注：本文由纯净天空筛选整理自RohitPrasad3大神的英文原创作品 MessageFormat equals() method in Java with Example。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。