Java 获取键盘输入

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);//in java.io.inputStream
int a=0, b=0;
while(sc.hasNextInt())
{
a = sc.nextInt();
b = sc.nextInt();
System.out.println(a);
System.out.println(b);
}

}

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);//in java.io.inputStream
String str ;
while(sc.hasNext())
{
str = sc.nextLine();
System.out.println(str);
}

}