Java Boolean compareTo()用法及代碼示例

布爾類的compareTo()方法是Java中的一種內置方法，用於將給定的布爾實例與當前實例進行比較。

用法:

BooleanObject.compareTo(Boolean a)

參數：它采用布爾值a作為要與當前實例進行比較的參數。

返回類型：函數的返回類型為int。它返回：

如果“ a”等於“ b”，則為0，
如果“ a”為假而“ b”為真，則為負值，
如果“ a”為真而“ b”為假，則為正值。

下麵是說明布爾類的compareTo()方法的程序：

示例1:

// Java code to implement 
// compareTo() 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.compareTo(b)); 
    } 
}

輸出：

true comparing with true = 0

示例2:

// Java code to implement 
// compareTo() 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.compareTo(b)); 
    } 
}

輸出：

true comparing with false = 1

示例3:

// Java code to implement 
// compareTo() 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.compareTo(b)); 
    } 
}

輸出：

false comparing with true = -1

相關用法

注：本文由純淨天空篩選整理自kundankumarjha大神的英文原創作品 Boolean compareTo() method in Java with examples。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。