Android split () string Segmentation Special use case detailed _android

Split () Split string

1. Distinctions in different contexts

Java: Split string cannot be written as split ("$")//$ for characters to be split

Android: Split strings need to be added with bracket split ("[$]")//$ for characters to be split

2. Special usage--when split () split string meets special symbol

Case analysis

String str = "ABC|DFG";
String[] All=str.split ("|");
System.out.println (All[0]);

Result is a

Cause analysis

| is a special symbol (".", "|", "^", etc.) that has been used in the regular expression.
So want to use | , it must be escaped with \, and in the Java string, \ is also a special symbol that has been used, and it needs to be escaped with \.

So should be: string[] All=str.split (("\\|") ；

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