public static String getRandomString(int len) {
String t = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
String n = "";
for (int r = 0; len > r; ++r){
n+=t.charAt(new Random().nextInt(t.length()));
}
return n;
}
String randStr = getRandomString(10);
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