1.

private void textString() {

String string1 = null,string2 = null,string3 = null,string4 = null,string5 = null;

String[] strings = new String[]{string1,string2,string3,string4,string5};

String[] stringContents = new String[]{"aaaa","bbbbb","vvvvv","ddddd","eeeee"};

for (int i = 0; i < stringContents.length; i++) {

strings[i] = stringContents[i];

}

string1 = "aaa";

if(string1 == null){

Log.d("wauoen", "CNM");

}

}