[Java] replace()、trim()

replace( ) 取代

Code:
public static void main(String[] args)
{
String s1 = "ABC123ABC123";
String s2 = "ABC 123";
String s3 = "ABC_123";

System.out.println(s1.replace("ABC","abc"));  //
System.out.println(s1);
System.out.println(s2.replace(" ",""));
System.out.println(s3.replace("_"," "));
}

輸出：
abc123abc123
ABC123
ABC 123
ABC123ABC123

trim( ) 去掉頭尾空白字元

Code:
public static void main(String[] args)
{
String s1 = "   123   ";
String s2 = "   abc  123  ";

System.out.println(s1. trim());
System.out.println(s2. trim()); //只會去掉前後的空白
}

輸出：
123
abc  123

By Hao★