public static void main(String[] args) {
StringBuilder str = new StringBuilder();
str.append("jaewkjldfxmopzdm");
int length = str.length();
for(int i = 3; i < length; i+=3) {
str.insert(length - i, ",");
}
System.out.print(str.toString());
}
StringBuilder str = new StringBuilder();
str.append("jaewkjldfxmopzdm");
int length = str.length();
for(int i = 3; i < length; i+=3) {
str.insert(length - i, ",");
}
System.out.print(str.toString());
}
2016-03-27
eclipse报错可以右击项目,点击properties,再点击 java Compiler,在右边选择1.7即可
2016-03-27