character java

character java是什么，讓我們一起了解一下？

character類用于對(duì)單個(gè)字符進(jìn)行操作，Character類在對(duì)象中包裝一個(gè)基本類型 char 的值，Java語言為內(nèi)置數(shù)據(jù)類型char提供了包裝類Character類。

character的構(gòu)造方法示例代碼如下：

public?class?characterDemo?{
public?static?void?main(string[]?args){
//創(chuàng)建對(duì)象
//Charcter?ch=new?Character((char)97);?Character?ch=new?Character('a')?System.out.println("ch:"+ch);

運(yùn)行結(jié)果：

ch:a

幾個(gè)主要方法：

public static boolean isUpperCase(char ch):判斷給定的字符是否是大寫字符

public static boolean isLowerCase(char ch):判斷給定的字符是否是小寫字符

public static boolean isDigit(char ch):判斷給定的字符是否是數(shù)字字符

public static char toUpperCase(char ch):把給定的字符轉(zhuǎn)換為大寫字符

public static char toLowerCase(char ch):把給定的字符轉(zhuǎn)換為小寫字符

具體代碼如下：

public?class?CharacterDemo?{
public?static?void?main(string[]?args){
//public?static?boolean?isUpperCase(charch):判斷給定的字符是否是大寫字符?System.out.println("isUpperCase:"+Character.isUpperCase('A));?System.out.println("isUpperCase:"+Character.isUpperCase('a'));?System.out.println("isUpperCase:"+Character.isUpperCase('e'));
System.out.println("----------------?---------");?
//public?static?boolean?isLowerCase(charch):判斷給定的字符是否是小寫字待?System.out.println("isLowerCase:"+Character.isLowerCase('A'));?System.out.println("isLowerCase:"+Character.isLowerCase('a'));?System.out.println("isLowerCase:"+Character.isLowerCase('0'));?System.out.println("---------------------------------");
//public?static?boolean?isDigit(charch):判斷給定的字符是否是數(shù)字字符?System.out.println("isDigit:"+Character.isDigit('A'));?System.out.println("isDigit:"+Character.isDigit("a')):?System.out.println("isDigit:"+Character.isDigit("0'));
System.out.println("------------------?-----------");?
//public?static?char?toUpperCase(charch)把給定的字符轉(zhuǎn)換為大寫字符?System.out.println("toUpperCase:"+Character.toUpperCase('A'));?System.out.println("toUpperCase:"+Character.toUpperCase('a'));?System.out.println("---------------------------------");
//public?static?char?toLowerCase(char?ch):把給定的字符轉(zhuǎn)換為小寫字符
System.out.println("tolowerCase:"+Character.toLowerCase('A)):
System.out.println("toLowerCase:"+Character.toLowerCase('a'));
}}

運(yùn)行結(jié)果：

isUpperCase:trueisUpperCase:falseisUpperCase:false

以上就是小編今天的分享了，希望可以幫助到大家。