If语句有goto命令或continue命令吗?JAVA

Question

我只是想知道如果语句有任何goto或continue命令吗?我用continue;但是if语句不起作用。

                       if ( typess == 1){
                ***OUTER:***
                     System.out.println("Type: Current Minimum of 1000.00 ");
                    System.out.print("Amount: " );
                    currenttype = Float.parseFloat(in.readLine());
                    if ( currenttype >= 1000 ){
                    balance += currenttype;
                    System.out.print("Successful " + currenttype + " Added to your Account");
                    }
                    else
                    {
                        **continue OUTER;**
                      System.out.print("MINIMUM IS 1000.00 ");
               }

Answer 1

可以用简单的递归方法求解。

只需将逻辑部分包含到方法中，验证输入，如果输入不正确，则进行递归调用，如以下示例:

public class Project {
    static Scanner scanner = new Scanner(System.in);
    public static void main(String[] args) {
        float float_val = getInput();
        System.out.println("You did input: " + float_val);
    }
    public static float getInput() {
        System.out.println("Please input variable");
        float input = scanner.nextFloat();
        if(input < 0) {
            System.out.println("Invalid input!");
            return getInput();
        }
        return input;
    }
}

示例输入:

-5 
-4
5

示例输出:

Please input variable
-5
Invalid input!
Please input variable
-4
Invalid input!
Please input variable
5
You did input: 5.0

Answer 2

有这种可能性，但您应该使用do-while循环，例如

boolean printMsg = false;
do {
    if (printMsg) {
        System.out.print("MINIMUM IS 1000.00 ");
    }
    printMsg = true;
    System.out.println("Type: Current Minimum of 1000.00 ");
    System.out.print("Amount: " );
    currenttype = Float.parseFloat(in.readLine());
} while (currenttype < 1000);
balance += currenttype;
System.out.print("Successful " + currenttype + " Added to your Account");