Convert List of String> to List of Object java

InJava, we have a lot of ways to convert List of String object to String object with a delimiter between the elements in List object. In this tutorial, I will share with you all some ways as below:

The first one, we will use StringBuilder object in Java.

We will read all elements in the List, one by one and useStringBuilderto add the delimiter among all elements. Note that, with the first element, we will not add the delimiter!

In detail, the method can be written as below:

Java

public static String join(List list, char delimiter) {

StringBuilder sb = new StringBuilder();

for (int i = 0; i < list.size(); i++) {

String s = list.get(i);

if (i == 0) {

sb.append(s);

continue;

}

sb.append(delimiter + s);

}

return sb.toString();

}

Example:

The second one, we will use collect() method of Stream object which was introduced since Java 8.

Java

public static String join(List list, char delimiter) {

return list.stream().collect(Collectors.joining(String.valueOf(delimiter)));

}

Example:

The third one, we will use join() static method of String object.

Since Java 8, Java introduced a new method named join() in String object, help us can convert from List object to String object easily.

Java

public static String join(List list, char delimiter) {

return String.join(String.valueOf(delimiter), list);

}

Example:

Finally, we can use an existing libraryApache Commons Langof Apache Foundation.

This libraryprovides a static method, namedjoin()in StringUtils classto help us can convert a List object to String object simply and easily. Because of its static method, then we only need call:

Java

1	StringUtils.join(List list, char delimiter);

Example:

Top List List

Convert List of String> to List of Object java

Bài Viết Liên Quan

Quảng Cáo

Có thể bạn quan tâm

Toplist được quan tâm

Quảng cáo

Xem Nhiều

Quảng cáo

Chúng tôi

Điều khoản

Trợ giúp

Mạng xã hội