第2个回答 2011-01-05
public static void main(String[] args) {
String str1 = "abcdefghijkl";
int length = str1.length();
String str2 = "";
for(int i=0;i<length;i++){
str2 += str1.substring(i,i+1);
System.out.println(str2);
}
}
打印出来的结果是:
a
ab
abc
abcd
abcde
abcdef
abcdefg
abcdefgh
abcdefghi
abcdefghij
abcdefghijk
abcdefghijkl