用java完成以下功能，可以完成主流编程语言的互相转换,要求尽量减少外部依赖,有清晰的使用教程

首先，这个问题可以通过编写编译器来实现。编译器是一种软件，它能够将源代码转换成可以在计算机上执行的二进制代码。下面是一个简单的编译器实现示例，可以将简单的算术表达式（例如 "1 + 2"）从一种语言转换为另一种语言：

import java.util.List;
import java.util.ArrayList;

public class Compiler {
  private static final String LANGUAGE_A = "language_a";
  private static final String LANGUAGE_B = "language_b";

  public static void main(String[] args) {
    String source = "1 + 2";
    String sourceLanguage = LANGUAGE_A;
    String targetLanguage = LANGUAGE_B;

    String result = compile(source, sourceLanguage, targetLanguage);
    System.out.println(result);
  }

  public static String compile(String source, String sourceLanguage, String targetLanguage) {
    if (LANGUAGE_A.equals(sourceLanguage) && LANGUAGE_B.equals(targetLanguage)) {
      // Convert source code from Language A to Language B
      List<String> tokens = tokenize(source);
      return translate(tokens);
    } else if (LANGUAGE_B.equals(sourceLanguage) && LANGUAGE_A.equals(targetLanguage)) {
      // Convert source code from Language B to Language A
      List<String> tokens = tokenize(source);
      return translate(tokens);
    } else {
      throw new IllegalArgumentException("Unsupported language conversion: " + sourceLanguage + " to " + targetLanguage);
    }
  }

  private static List<String> tokenize(String source) {
    // Tokenize the source code into a list of tokens
    List<String> tokens = new ArrayList<>();
    // ...
    return tokens;
  }

  private static String translate(List<String> tokens) {
    // Translate the tokens into the target language
    StringBuilder result = new StringBuilder();
    // ...
    return result.toString();
  }
}

这个示例仅是一个概念，并没有实际的语言转换功能。实现这个功能需要在 `tokenize` 和 `translate` 方法中填充相