Java -Zeichenfolge entfernen Zeichen entfernen
String str = "abcdDCBA123";
String strNew = str.replace("a", ""); // strNew is 'bcdDCBA123'
aso
String str = "abcdDCBA123";
String strNew = str.replace("a", ""); // strNew is 'bcdDCBA123'# subString(int start, int end);
String a = "Hello!";
b = a.subString(0,a.length()-1) #Remove the last String
# b should be "Hello" thenpublic extractLetters(String str){
String result="";
for(int i= 0; i< str.length; i++){
if(Character.isLetter(str.charAt(i))){
result+=str.charAt(i);
}
}