Java中的布尔型 equals() 方法及示例
Boolean 类的equals()方法是Java的内置方法,用于检查两个布尔对象的相等性。
句法:
BooleanObject.equals(Object ob)
参数:它以Object类型的参数ob作为输入,它是要比较的实例。
返回类型:返回类型为boolean 。如果指定的对象“ob”与“布尔对象”具有相同的值,则返回 true,否则返回 false。
下面是说明 Boolean 类的 equals() 方法的程序:
方案一:
// Java code to implement
// equals() method of Boolean class
class GeeksforGeeks {
// Driver method
public static void main(String[] args)
{
// Boolean object
Boolean a = new Boolean(true);
// Boolean object
Boolean b = new Boolean(true);
// compare method
System.out.println(a + " comparing with " + b
+ " = " + a.equals(b));
}
}
输出:
true comparing with true = true
方案二:
// Java code to implement
// equals() method of Java class
class GeeksforGeeks {
// Driver method
public static void main(String[] args)
{
// Boolean object
Boolean a = new Boolean(true);
// Boolean object
Boolean b = new Boolean(false);
// compare method
System.out.println(a + " comparing with " + b
+ " = " + a.equals(b));
}
}
输出:
true comparing with false = false
方案 3:
// Java code to implement
// equals() method of Java class
class GeeksforGeeks {
// Driver method
public static void main(String[] args)
{
// Boolean object
Boolean a = new Boolean(false);
// Boolean object
Boolean b = new Boolean(true);
// compare method
System.out.println(a + " comparing with " + b
+ " = " + a.equals(b));
}
}
输出:
false comparing with true = false