java - 是什么导致我的循环仅在第一次迭代中忽略此 "\t"？

Question

出于某种原因，我的循环仅在 for 循环的第一次迭代后输出“\t”。 这是我的循环的代码:

input = -1;
private String[] types = {"none", "vanilla", "hazelnut", "peppermint", "mocha", "caramel"};
while ( (input < 0) || (input > (types.length - 1)) ){ //gets user's latte flavor input
        System.out.println("Enter the number corresponding to the latte type you would like:");
        for ( int i = 0; i < types.length; i++ ){
            if ( i <= (types.length - 2) ){ //prints two options per line
                System.out.println(i + ": " + types[i] + "\t" + (i + 1) + ": " + types[i + 1]);
            }
            else if ( i == (types.length - 1) ){
                System.out.println(i + ": " + types[i]);
            }
            else{ //does nothing on odd indices
            }
            i++;
        }
        input = keyboard.nextInt();
    }

输出如下:

Enter the number corresponding to the latte type you would like:
0: none     1: vanilla
2: hazelnut     3: peppermint
4: mocha        5: caramel

正如我们所看到的，“1: vanilla”的间距与其他行的间距不同。然而，我的 Tea 类代码可以正常工作:

input = -1;
private String[] types = {"white", "green", "oolong", "black", "pu-erh", "camomille"};
while ( (input < 0) || (input > (types.length - 1)) ){ //gets user's tea flavor input
        System.out.println("Enter the number corresponding to the tea type you would like:");
        for ( int i = 0; i < types.length; i++ ){
            if ( i <= (types.length - 2) ){ //prints two options per line
                System.out.println(i + ": " + types[i] + "\t" + (i + 1) + ": " + types[i + 1]);
            }
            else if ( i == (types.length - 1) ){
                System.out.println(i + ": " + types[i]);
            }
            else{ //does nothing on odd indices
            }
            i++;
        }
        input = keyboard.nextInt();
    }

输出如下:

Enter the number corresponding to the tea type you would like:
0: white    1: green
2: oolong   3: black
4: pu-erh   5: camomille

是什么导致我的 Latte 循环(我的 Espresso 循环也遇到这个间距问题)的输出与我的 Tea 循环不同？感谢您帮助我理解这种行为!

Answer 1

嗯，TAB 确实在那里。请注意，0: none 比您发布的其他示例短一个字符。因此，您按 Tab 键切换到较早的制表位。