Java Level equals()用法及代碼示例

java.util.logging.Level的equals()方法用於檢查此級別的對象是否等於傳遞的對象。如果兩個對象相等，則方法將返回true，否則返回false。

用法:

public boolean equals(Object ox)

參數：此方法接受對象ox，它是要與之進行比較的參考對象。

返回：僅當兩個對象具有相同的級別值時，此方法返回true。

以下示例程序旨在說明equals()方法：
示例1:

// Java program to illustrate equals() method 
  
import java.util.logging.Level; 
import java.util.logging.Logger; 
  
public class GFG { 
  
    public static void main(String[] args) 
    { 
  
        // Create a Logger 
        Logger logger 
            = Logger.getLogger( 
                        Object.class.getName()) 
                  .getParent(); 
  
        // Get level of logger 
        Level level1 
            = logger.getLevel(); 
  
        // Create a second Logger 
        Logger logger2 
            = Logger.getLogger( 
                        String.class.getName()) 
                  .getParent(); 
  
        // Get level of second logger 
        Level level2 
            = logger2.getLevel(); 
  
        // apply equal method 
        boolean value = level1.equals(level2); 
  
        // print level names 
        System.out.println("Both level are equal = "
                           + value); 
    } 
}

輸出：

Both level are equal = true

示例2:

// Java program to illustrate equals() method 
  
import java.util.ArrayList; 
import java.util.logging.Level; 
import java.util.logging.Logger; 
  
public class GFG { 
  
    public static void main(String[] args) 
    { 
  
        // Create a Logger 
        Logger logger 
            = Logger.getLogger( 
                        Object.class.getName()) 
                  .getParent(); 
  
        // Get level of logger 
        Level level1 
            = logger.getLevel(); 
  
        // Create a second Logger for ArrayList class 
        Logger logger2 
            = Logger.getLogger( 
                ArrayList.class.getName()); 
  
        // Get level of second logger 
        Level level2 
            = logger2.getLevel(); 
  
        // apply equal method 
        boolean value = level1.equals(level2); 
  
        // print level names 
        System.out.println("Both level are equal = "
                           + value); 
    } 
}

輸出：

Both level are equal = false

參考文獻： https://docs.oracle.com/javase/10/docs/api/java/util/logging/Level.html#equals(java.lang.Object)

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