环境: idea2020.1
插件: LeetCode-editor 6.7
一、IDEA安装LeetCode插件

安装完成重启idea
打开插件


URL可以选择国服和世界服。LoginName和Password填自己的用户名和密码即可。
需要配置的选项为:
TempFilePath: 自己保存代码的包的位置
CodeFileName:
$!velocityTool.camelCaseName(${question.titleSlug})
CodeTemplate:
${question.content}
package leetcode.editor.cn;
//Java:${question.title}
public class $!velocityTool.camelCaseName(${question.titleSlug}){
 public static void main(String[] args) {
  Solution solution = new $!velocityTool.camelCaseName(${question.titleSlug})().new Solution();
  // TO TEST
 }
 
 ${question.code}
}
配置完成后 刷新即可
输入代码测试运行提交

代码
package leetcode.editor.cn;
import java.util.Arrays;
//Java:两数之和
public class TwoSum {
 public static void main(String[] args) {
  Solution solution = new TwoSum().new Solution();
  // TO TEST
  int[] a ={1, 2, 3, 4};
  int[] ints = solution.twoSum(a, 3);
  System.out.println(Arrays.toString(ints));
 }
 class Solution {
  public int[] twoSum(int[] nums, int target) {
   for (int i = 0; i < nums.length; i++) {
    for (int j = i + 1; j < nums.length; j++) {
     if (nums[j] == target - nums[i]) {
      return new int[]{i, j};
     }
    }
   }
   throw new IllegalArgumentException("No two sum solution");
  }
 }
}