Boolean类在Java中的重要性是什么？

The java.lang.Boolean class is a final class and it is a subclass of Object class. The Boolean class wraps the value of primitive datatype boolean into a Boolean object. An object of type Boolean contains a single field whose type is boolean. In other words, the wrapper classes create objects for primitive data types. This class provides many methods for converting a boolean to a String and a String to a boolean as well as other constants and methods useful when dealing with a boolean.

Syntax

public final class Boolean extends Object implements Serializable, Comparable

Example1

public class BooleanTest {
   public static void main(String[] args) {
      Boolean b;
      b = new Boolean(true);
      boolean b1;
      b1 = b.booleanValue();
      String data = "The Primitive value of Boolean object " + b + " is " + b1;
      System.out.println(data);
   }
}

Output

The Primitive value of Boolean object true is true

Example2

的中文翻译为：

示例2

public class BooleanTest1 {
   public static void main(String args[]) {
      Boolean b1, b2;
      b1 = new Boolean(true);
      b2 = new Boolean("false");
      System.out.println("b1 Value is : "+ b1.booleanValue());
      System.out.println("b2 Value is : "+ b2.booleanValue());
      System.out.println("b1 compareTo b2 : "+ b1.compareTo(b2));
      System.out.println("b1 equals b2 : "+ b1.equals(b2));
   }
}

Output

b1 Value is : true
b2 Value is : false
b1 compareTo b2 : 1
b1 equals b2 : false

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