我不知道爲什麼我的循環打印兩次。我有兩個獨立的類,我已經創建了,無論什麼原因,我不知道爲什麼它打印兩次到控制檯。我不確定是不是因爲我在TableTest中稱它爲錯誤?或者如果我在其他地方做錯了什麼。我已經在我的IDE和我的命令行中運行了這個功能,但仍然遇到同樣的問題。循環打印兩次java
public class TableTest {
public static void main(String[] args){
int getBegin, getEnd;
System.out.println("Enter a number to start with: ");
Scanner input = new Scanner(System.in);
getBegin = input.nextInt();
while (getBegin < 0){
System.out.println("Please enter a number greater than 0.");
getBegin = input.nextInt();
}
System.out.println("Enter a number to end with: ");
getEnd = input.nextInt();
while (getEnd < 0 || getEnd < getBegin){
System.out.println("Please enter a number greater than 0. Or greater than your first input.");
getEnd = input.nextInt();
}
MultiplicationTable loop = new MultiplicationTable(getBegin, getEnd);
loop.printTable(getBegin, getEnd);
}
}
public class MultiplicationTable {
public MultiplicationTable(int begin, int end){
printTable(begin,end);
}
void printTable(int begin, int end){
System.out.println(String.format("%-10s %-10s %-10s", "Number", "Squared" , "Cubed"));
for (int i = begin; i <= end; ++i){
System.out.println(String.format("%-10s %-10s %-10s", i, i* i, i*i*i));
}
}
}
啊!謝謝你,我很困惑爲什麼會這樣。 – Sailanarmo