格式化java中具有冒号标识的变量的字符串

String key = "name";
String value = "John";
String formattedString = String.format("%s: %s", key, value);
System.out.println(formattedString);

name: John

String key = "age";
int value = 25;
StringBuilder sb = new StringBuilder();
sb.append(key).append(": ").append(value);
String formattedString = sb.toString();
System.out.println(formattedString);

age: 25