簡短的類compareTo()方法 (Short class compareTo() method)

• compareTo() method is available in java.lang package.

  compareTo()方法在java.lang包中可用。

• compareTo() method is used to check equality or inequality for this Byte object against the given Byte object mathematically or in other words, we can say this method is used to compare two Byte objects.

  compareTo()方法用于在數學上檢查此Byte對象與給定Byte對象的相等性或不相等性，換句話說，可以說此方法用于比較兩個Byte對象。

• compareTo() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  compareTo()方法是一種非靜態方法，只能通過類對象訪問，如果嘗試使用類名稱訪問該方法，則會收到錯誤消息。

• compareTo() method does not throw an exception at the time of comparing Byte object.

  在比較Byte對象時， compareTo()方法不會引發異常。

Syntax:

句法：

    public int compareTo(Byte value2);

Parameter(s):

參數：

• Byte value2 – represents the Byte object to compare with.

  字節值2 –表示要比較的字節對象。

Return value:

返回值：

The return type of this method is int, it returns an integer value based on the following cases,

此方法的返回類型為int ，它基于以下情況返回整數值：

• It returns 0, if value1 is mathematically equal to value2.

  如果value1在數學上等于value2 ，則返回0 。

• It returns the value < 0, if value1 is mathematically less than value2.

  如果value1在數學上小于value2 ，則返回值<0 。

• It returns the value > 0, if value1 is mathematically greater than value2.

  如果value1在數學上大于value2 ，則返回值> 0 。

Example:

例：

// Java program to demonstrate the example 
// of compareTo(Byte value2) method of Byte class
public class CompareToOfByteClass {
public static void main(String[] args) {
// Variables initialization
byte b1 = 10;
byte b2 = 20;
// Byte instance 
Byte value1 = new Byte(b1);
Byte value2 = new Byte(b2);
// It compare two Byte objects and placed the result 
// in another variable (compare) of integer type
int compare = value1.compareTo(value2);
// Display result
System.out.println("value1.compareTo(value2): " + compare);
System.out.println();
if (compare == 0)
System.out.println("value1 is equal to value2");
else if (compare < 0)
System.out.println("value1 is less than value2");
else
System.out.println("value1 is greater than value2");
}
}

Output

輸出量

value1.compareTo(value2): -10value1 is less than value2

翻譯自: https://www.includehelp.com/java/byte-class-compareto-method-with-example.aspx