从Java中的字符串中删除换行符，空格和制表符
要从字符串中删除换行符，空格和制表符，请如下所示将其替换为空。
replaceAll("[\\n\\t ]", "");在上面，新行，制表符和空格将被替换为空，因为我们已经使用了replaceAll()
以下是完整的示例。
示例
public class Demo {
public static void main(String[] args) {
String originalStr = "Demo\n\tText";
System.out.println("Original String with tabs, spaces and newline: \n"+originalStr);
originalStr = originalStr.replaceAll("[\\n\\t ]", "");
System.out.println("\nString after removing tabs, spaces and new line: "+originalStr);
}
}输出结果
Original String with tabs, spaces and newline: Demo Text String after removing tabs, spaces and new line: DemoText