String str = " ABCD \nEFG HIJK\nLMN ";
public static void main(String[] args) {
String str = " ABCD \nEFG HIJK\nLMN ";
System.out.println("str.trim():\n" + str.trim());
System.out.println("------分割線------");
System.out.println("str.replace(\" \", \"\"):\n" + str.replace(" ", ""));
System.out.println("------分割線------");
System.out.println("str.replaceAll(\" \", \"\"):\n" + str.replaceAll(" ", ""));
System.out.println("------分割線------");
System.out.println("str.replaceAll(\"\\\\s*\", \"\"):\n" + str.replaceAll("\\s*", ""));
System.out.println("------分割線------");
}
打印輸出:
str.trim():
ABCD
EFG HIJK
LMN
------分割線------
str.replace(" ", ""):
ABCD
EFGHIJK
LMN
------分割線------
str.replaceAll(" ", ""):
ABCD
EFGHIJK
LMN
------分割線------
str.replaceAll("\\s*", ""):
ABCDEFGHIJKLMN
------分割線------