Java每n行追加换行符

Question

String[] names = new String[18];
names[0] = "James Raider";
names[1] = "Calm Hain";
names[2] = "Ewds Ashby";
names[3] = "Gedge Taylor";
names[4] = "Hay Fin";
names[5] = "Ian Hilton";
names[6] = "John Coke";
names[7] = "Nathan Dryer";
names[8] = "Jess Maguire";
names[9] = "Jamie Loyal";
names[10] = "Luke Shwinger";
names[11] = "Parrot Tom";
names[12] = "John Clarke";
names[13] = "Steven Mason";
names[14] = "Shing Lao";
names[15] = "Tom Brook";
names[16] = "Arthitus Pint";
names[17] = "Yifan Yao";

StringBuilder sb = new StringBuilder();
ArrayList<Integer> list = new ArrayList();
for (int i = 0; i < names.length; i++) {
    list.add(i);
}
Collections.shuffle(list);
for (int i = 0; i < names.length; i++) {
    field.append(names[list.get(i)] + "\n");
    for (int u = 0; u < (Integer) number.getValue(); u++) {
        field.append("\n");
    }
}

我试图每次都在输出中添加新行number.getValue()。我正在做的是在每行之后添加它，但是我只希望它在设置一定次数后创建它。

例子：3次

Harry
John 
Jake

Amanda
Holly
Sam

Answer 1

只需if在for循环中添加语句，该语句将在每n行输出之后输出新行（我相信这是您想要的，而不是在n次迭代之后）。假设您要每3行换一行伪代码：

int newLine = 3;
int multiplicator = 1;
for(int i = 0; i< names.length; i++){
  if( newLine == i){
    // print extra line after every 3rd output        
    field.append("\n");
    newLine = 3; //to reset variable to the correct delimiter on each subsequent n-th iteration
    multiplicator++;
    newLine = newLine * multiplicator;
  }
field.append(names[i] + "\n")
// print regular value on normal line during every iteration
}