我想删除字符串的第一个字符

Question

I have very very silly question but it is taking me a long time and I really don't know what the problem is. Take a look to my code please:

String PT = myedittext.getText().toString();
int len = PT.length();
char chars[] = PT.toCharArray();
for (int i = 0; i < len; i++)
chars[i] = chars[i++];

As you can see, I want to delete the first character but it is not working and after this code my array is the same before.

I'm going crazy. What is the error?

Answer 1

如果要摆脱第一个字符，只需使用substring() ：

String newString = PT.substring(1);

Answer 2

change this:

for (int i = 0; i < len; i++)
chars[i] = chars[i++];

to this:

for (int i = 0; i < len-1; i++)
chars[i] = chars[i+1];

the result string will be:

Arrays.toString(chars);

also if you don't need the char array and now that you know the problem of your code substring would be a better alternative.

Answer 3

The problem occurs here:

chars[i] = chars[i++];

This is the same as:

chars[i] = chars[i];
i = i + 1;

For removing the first character you should use substring:

 PT.substring(1)