Splitting a string in Java in a specific way and storing it an array

Question

我试图将字符串"ABCD"拆分为一个数组，该数组将保存值["AB","BC","CD"] ，但我不确定如何处理。

Answer 1

Here's an idea:

String string1 = "ABCD";

for(int i = 0; i < string1.length() - 1; i++){
    String string2 = Character.toString(string1.charAt(i)); 
    string2 += Character.toString(string1.charAt(i+1));
    System.out.println(string2);
    }

What "Character.toString(string1.charAt(i))" does is basically find the character of string1's "i" value. So for example, if i = 0, string2 would equal string1's value at 0, which is "A". Then, in the next line of code, string2 adds string1's value of "i+1" (which is the next letter, so B). Therefore, it will print "AB", "BC, and "CD".

Answer 2

Can be done really easily:

String string = "ABCDEFGH";
String[] result = new String[string.length() - 1];

for(int i = 0; i < result.length; i++) {
    result[i] = string.charAt(i) + "" + string.charAt(i+1);
}

Variable "result" consists of:

"AB"
"BC"
"CD"
"DE"
"EF"
"FG"
"GH"