从 Java 中的字符串中删除重复项 [英] Removing duplicates from a String in Java

问题描述

我正在尝试遍历一个字符串以删除重复的字符.

例如字符串 aabbccdef 应该变成 abcdef并且字符串 abcdabcd 应该变成 abcd

这是我目前所拥有的:

公共类测试{公共静态无效主(字符串 [] args){String input = new String("abbc");字符串输出 = new String();for (int i = 0; i < input.length(); i++) {for (int j = 0; j 

最好的方法是什么?

解决方案

使用 Stream 使事情变得简单.

noDuplicates = Arrays.asList(myString.split("")).溪流().清楚的().collect(Collectors.joining());

<块引用>

这里有更多关于 Stream 的文档以及您可以使用的所有内容它 :https://docs.oracle.com/javase/8/docs/api/java/util/stream/package-summary.html

描述"部分对 Streams 的好处非常有指导意义.

I am trying to iterate through a string in order to remove the duplicates characters.

For example the String aabbccdef should become abcdef and the String abcdabcd should become abcd

Here is what I have so far:

public class test {

    public static void main(String[] args) {

        String input = new String("abbc");
        String output = new String();

        for (int i = 0; i < input.length(); i++) {
            for (int j = 0; j < output.length(); j++) {
                if (input.charAt(i) != output.charAt(j)) {
                    output = output + input.charAt(i);
                }
            }
        }

        System.out.println(output);

    }

}

What is the best way to do this?

解决方案

Using Stream makes it easy.

noDuplicates = Arrays.asList(myString.split(""))
                     .stream()
                     .distinct()
                     .collect(Collectors.joining());

Here is some more documentation about Stream and all you can do with it : https://docs.oracle.com/javase/8/docs/api/java/util/stream/package-summary.html

The 'description' part is very instructive about the benefits of Streams.

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