Using split()
Pass the regular into split(). The return is a String[] type. However, intercepting in this way will have a large performance penalty, because analyzing the regularity is very time-consuming.
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String str = "123123123@gmail.com";
String[] strs = str.split("@");
for (int i = 0; i < strs.length; i++) {
System.out.println(strs[i]);
}
/**
* result:
* 123123123
* gmail.com
* /
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Using subString() to intercept string
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String str = "123123123@gmail.com";
String str_ = str.substring(2);
System.out.println(str_);
/**
* result:
* 3123123@gmail.com
* /
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- Using beginIndex and endIndex
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String str = "123123123@gmail.com";
String str_ = str.substring(2, 9);
System.out.println(str_);
/**
* result:
* 3123123
* /
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String str = "123123123@gmail.com";
String str_ = str.substring(2, str.indexOf("@"));
System.out.println(str_);
/**
* result:
* 3123123
* /
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