字符串转换成相应形式问题

大咖们好，请问如何将 String str = "aababc";转换成[a,a,b,a,b,c] 和{a,a,b,a,b,c}呢，先谢谢了！

 String s = "aababc";
String s1 = "[";
for (int i = 0; i < s.length(); i++) {
if (i > 0) s1 += ",";
s1 += s.subString(i, 1);
}
s1 += "]";

String str = "aababc";
    char[]  charStr = str.toCharArray();
    String[] strArray = new String[6];
    for(int i = 0;i < charStr.length;i++)
        strArray[i] = String.valueOf(charStr[i]);

字符串转换运用相对应的函数即可

 String s1 = "[";
for (int i = 0; i < str.length(); i++) {
if (i > 0) s1 += ",";
s1 += s.subString(i, 1);
}
s1 += "]";