需要刪除字符串中多余的方括號

Question

static ArrayList<String> coordinates = new ArrayList<String>();
static String str = "";
static ArrayList scribbles = new ArrayList();

coordinates.add("String to be placed, String not to be placed");
String codChange = coordinates.toString().replaceAll(", ", "");
StringBuffer sb = new StringBuffer(codChange);
sb.insert(1,"m ");
ArrayList aListNumbers = new ArrayList(Arrays.asList(sb.toString()));
System.out.println("Coordinates: " + aListNumbers.toString().replaceAll("\\[|\\]", ""));
                scribbles.add(aListNumbers);
str = scribbles.toString();
System.out.println("String: " + str);

OUTPUT：

Coordinates: m String to be placedString not to be placed
String: [[m String to be placedString not to be placed]]

我希望String：出現一個方括號，例如：

String: [m String to be placedString not to be placed]

Answer 1

由於需要兩個不同的替換。

使用以下代碼

String s = "[[m String to be placedString not to be placed]]";
System.out.println(s.replaceAll("[[","[").replaceAll("]]","]");

如果您確定[[]始終位於確切位置，而]]始終位於結尾，則只需在同一SO答案線程中的其他答案中使用子字符串即可。