The split() method is explained in detail
effect:
- split in java is mainly used to separate strings
Grammar format:
Parameter details: o(*￣▽￣*)o
① The first parameter, regex of String type: indicates the basis for segmentation, or the basis for judgment
② The second parameter, limit of int type: the incoming parameter indicates how many arrays to divide
Example 1, (only the basis for segmentation, pay attention to " , "):
public class Demo1 {
private static String s = "Banana,Apple,Grape,Mango,Pear";
public static void main(String[] args) {
//因为 split会将 符合分割条件的 字符串 分解成一个个的 小数组
//因此需要一个 字符数组 进行接收
String[] text = s.split(",");
System.out.println("分割后的结果如下所示：");
for (int i=0;i<text.length;i++){
System.out.println(text[i]);
}
}
}
In this result the commas are gone
Example 2, (restrictions are divided into several groups, that is, the second parameter is passed in)
public class Demo1 {
private static String s = "Banana,Apple,Grape,Mango,Pear";
public static void main(String[] args) {
String[] text = s.split(",",3);
System.out.println("只分3组的结果如下所示：");
for (int i=0;i<text.length;i++){
System.out.println(text[i]);
}
}
}
} 
The commas in the first two groups are gone, but not in the last group
Summarize
- ① From the print results, the first parameter passed in (regex " , ") disappears, so more consideration should be given when using it
- ② When the second parameter is passed in, only the regex that matches the first two groups (this article is " , ") disappears, and the subsequent ones remain unchanged
ps: It is said that in the study of the class library (headache), but you also need to take more notes, read more and more, and check if you forget. Plus lots of practice. . . Also, thank you for seeing yourself here ^O^
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