角色类isUpperCase()方法 (Character class isUpperCase() method)

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

  isUpperCase()方法在java.lang包中可用。

• isUpperCase() method is used to check whether the given char value is uppercase or not.

  isUpperCase()方法用于检查给定的char值是否为大写。

• isUpperCase() method does not throw an exception at the time of checking the given char value is uppercase or not.

  在检查给定的char值是否为大写时， isUpperCase()方法不会引发异常。

Syntax:

句法：

    public boolean isUpperCase (Char value);

Parameter(s):

参数：

• Char value – represents the char value to be checked.

  字符值 –表示要检查的字符值。

Return value:

返回值：

The return type of this method is boolean, it returns a boolean value based on the following cases,

此方法的返回类型为boolean ，它基于以下情况返回布尔值：

• It returns true, if the given char value is uppercase.

  如果给定的char值为大写，则返回true 。

• It returns false, if the given char value is not in uppercase.

  如果给定的char值不是大写，则返回false 。

Example:

例：

// Java program to demonstrate the example 
// of boolean isUpperCase (Char value) method of Character class
public class IsUpperCaseOfCharacterClass {
public static void main(String[] args) {
// It returns true because the passing 
// character is in UpperCase   
boolean result1 = Character.isUpperCase('P');
// It returns false because the passing 
// character is not in UpperCase  
boolean result2 = Character.isUpperCase('p');
// Display values of result1 , result2
System.out.println("Character.isUpperCase('P'): " + result1);
System.out.println("Character.isUpperCase('p'): " + result2);
}
}

Output

输出量

Character.isUpperCase('P'): true
Character.isUpperCase('p'): false

翻译自: https://www.includehelp.com/java/character-class-isuppercase-method-with-example.aspx