Java Collator equals(Object)用法及代码示例

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

用法:

public boolean equals(Object that)

参数：此方法接受两个Collator对象，它们之间将进行比较。

返回值：如果两个Collator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 initalizing new simple rule 
            String simple = "< a< b< c< d"; 
  
            // Creating and initializing 
            // new RuleBasedCollator Object 
            RuleBasedCollator col_1 
                = new RuleBasedCollator(simple); 
  
            // Creating and initializing 
            // Collator Object 
            Collator col_2 
                = Collator.getInstance(Locale.US); 
  
            // compare both object 
            // using equals() mehtod 
            boolean i = col_1.equals(col_2); 
  
            // display result 
            if (i) 
                System.out.println(col_1 
                                   + " is equal to "
                                   + col_2); 
            else
                System.out.println(col_1 
                                   + " is not equal to "
                                   + col_2); 
        } 
  
        catch (ClassCastException e) { 
  
            System.out.println("Exception thrown:" + e); 
        } 
        catch (ParseException e) { 
  
            System.out.println("Exception thrown:" + e); 
        } 
    } 
}

输出：

java.text.RuleBasedCollator@5eb2e1c2 is not equal to java.text.RuleBasedCollator@289747d6

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 
            // Collator Object 
            Collator col_1 
                = Collator.getInstance(Locale.UK); 
  
            // Creating and initializing 
            // Collator Object 
            Collator col_2 
                = Collator.getInstance(Locale.US); 
  
            // compare both object 
            // using equals() mehtod 
            boolean i = col_1.equals(col_2); 
  
            // display result 
            if (i) 
                System.out.println(col_1 
                                   + " is equal to "
                                   + col_2); 
            else
                System.out.println(col_1 
                                   + " is not equal to "
                                   + col_2); 
        } 
  
        catch (ClassCastException e) { 
  
            System.out.println("Exception thrown:" + e); 
        } 
    } 
}

输出：

java.text.RuleBasedCollator@289747d6 is equal to java.text.RuleBasedCollator@289747d6

参考： https://docs.oracle.com/javase/9/docs/api/java/text/Collator.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 Collator equals(Object) 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。