The use of the Java separator function split ("",-1) __java

1. If the last digit of the string has a value, there is no difference.

2. A number of the last n bits are cut, split ("") will not continue to slice, split ("",-1) will continue to slice

String line = "A b  c         ";  
  String [] tmp = Line.split ("");  
  SYSTEM.OUT.PRINTLN (tmp.length+ "------");  
  for (int i=0;i<tmp.length;i++) {  
      System.out.println (i+ "=" +tmp[i]);  
  }  
    
  String [] items = Line.split ("", -1);  
  System.out.println (items.length+ "========");  
  for (int i=0;i<items.length;i++) {  
      System.out.println (i+ "=" +items[i]);  
  }  

Results:

4------
0=a
1=b
2=
3=c
13========
0=a
1=b
2=
3=c
4=
5=
6=
7=
8=
9=
10=
11=
12=

[Java] View plain copy
String = "A b  c         d";  
  String [] tmp = Line.split ("");  
  SYSTEM.OUT.PRINTLN (tmp.length+ "------");  
  for (int i=0;i<tmp.length;i++) {  
      System.out.println (i+ "=" +tmp[i]);  
  }  
    
  String [] items = Line.split ("", -1);  
  System.out.println (items.length+ "========");  
  for (int i=0;i<items.length;i++) {  
      System.out.println (i+ "=" +items[i]);  
  }  

Results:

------
0=a
1=b
2=
3=c
4=
5=
6=
7=
8=
9=
10=
11=
12=d
13========
0=a
1=b
2=
3=c
4=
5=
6=
7=
8=
9=
10=
11=
12=d