Various input scenarios for the Java Language (ACM Common)

1. Enter only one set of data:
Scanner s=new Scanner (system.in);
int A=s.nextint ();
int B=s.nextint ();

2. Enter more than one set of data, no description to enter a few sets of data, each group of data for a row:
Scanner s=new Scanner (system.in);
while (S.hasnext ()) {//To determine if data end
int A=s.nextint ();
int B=s.nextint ();
}

3. Enter multiple sets of data, the first behavior of an integer n, indicating that there are n sets of test data, followed by N-group data, each group of data in one row;
int A;
int b;
int n;
System.out.println ("Please enter an integer n:");
Scanner in=new Scanner (system.in);
N=in.nextint ();
for (int i=0;i<n;i++) {
System.out.println ("Please enter an integer A and b:");
Scanner s=new Scanner (system.in);
A=s.nextint ();
B=s.nextint ();
System.out.println (A+B);
}
3. Read in string
The input data has more than one line, the first line is an integer n, which represents the number of test numbers, followed by n rows;
System.out.println ("Please enter an integer n:");
Scanner s=new Scanner (system.in);
int N=s.nextint ();
for (int i=0;i<n;i++) {
String Str=s.next ();
System.out.println (str);
}
Or you can write it like this:
System.out.println ("Please enter an integer n");
Scanner s=new Scanner (system.in);
int N=integer.parseint (S.nextline ());
for (int i=0;i<n;i++) {
String Str=s.nextline ();
System.out.println (str);
}
3. Input string
If given a date, the date of the output is the day ordinal of the year.
System.out.println ("Please enter a year");
Scanner s=new Scanner (system.in);
int dd[]={0,31,28,31,30,31,30,31,31,30,31,30,31};
while (S.hasnext ()) {
int days=0;
String Str=s.nextline ();
String[] Date=str.split ("/");
int Y=integer.parseint (date[0]);
int M=integer.parseint (date[1]);
int D=integer.parseint (date[2]);
if ((y%400 = = 0 | | (y%4 = = 0 && y%100!=0)) && m>2) days + +;
Days + = D;
for (int i=0;i<m;i++) {
Days + = Dd[i];
}
System.out.println (days);
}

Various input scenarios for the Java Language (ACM Common)