Java演算法測試的輸入模板
Java資料讀入
讀入一個整數：
Scanner sc = new Scanner (System.in);
int n = sc.nextInt();
讀入一個字串
Scanner sc = new Scanner (System.in);
String s=sc.next();
讀入一個浮點數
Scanner sc = new Scanner (System.in);
double t = sc.nextDouble();
讀入一行
Scanner sc = new Scanner (System.in);
String s = sc.nextLine();
判斷是否有下一個輸入sc.hasNext()或sc.hasNextInt()或sc.hasNextDouble()或sc.hasNextLine()
Java讀入一行空格隔開的資料
| Sample Input 1 2 3 4 5 6 7 8 9 10 11 12 13 |
| import java.util.Scanner; public class Demo { public static void main(String[] args) {
Scanner sc = new Scanner(System.in); String s = sc.nextLine();
String ss[] = s.split(" "); int len = ss.length;
int[] src = new int[len];
for(int i = 0; i < len; i++){ src[i] = Integer.parseInt(ss[i]); } } } |
讀入一個整數
| public class Solution{ public static void main(String[] args){ Scanner in = new Scanner(System.in); int a = in.nextInt(); } } |
連續資料多個數
| public static void readManyNumber(){ Scanner in = new Scanner(System.in); int len = in.nextInt(); int[] array = new int[len]; for(int i = 0; i < len; i++){ array[i] = in.nextInt(); }
} |
讀入整數
| import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner sc =new Scanner(System.in);
while(sc.hasNext()){ //判斷是否結束 int score = sc.nextInt();
}//讀入整數
} } |
讀入實數
輸入資料有多組，每組佔2行，第一行為一個整數N，指示第二行包含N個實數。
| Sample Input 4 56.9 67.7 90.5 12.8 5 56.9 67.7 90.5 12.8 |
| import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner sc =new Scanner(System.in);
while(sc.hasNext()){ int n = sc.nextInt();
for(int i=0;i<n;i++){ double a = sc.nextDouble(); } } } } |
讀入字串
輸入資料有多行，第一行是一個整數n，表示測試例項的個數，後面跟著n行，每行包括一個由字母和數字組成的字串。
| Sample Input 2 asdfasdf123123asdfasdf asdf111111111asdfasdfasdf |
| import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int n = Integer.parseInt(sc.nextLine()); for(int i=0;i<n;i++){ String str = sc.nextLine();
} } } |