如何将字符串转换为变量

var variableName = 'myVariable';
var value = 'Hello World';

// 使用eval函数
eval('var ' + variableName + ' = "' + value + '";');
console.log(myVariable); // 输出：Hello World

// 使用window对象
window[variableName] = value;
console.log(myVariable); // 输出：Hello World

variable_name = 'my_variable'
value = 'Hello World'

# 使用eval函数
eval(variable_name + ' = "' + value + '"')
print(my_variable)  # 输出：Hello World

# 使用globals函数
globals()[variable_name] = value
print(my_variable)  # 输出：Hello World

import java.lang.reflect.Field;

public class Main {
    public static void main(String[] args) throws Exception {
        String variableName = "myVariable";
        String value = "Hello World";

        Class<?> clazz = Main.class;
        Field field = clazz.getDeclaredField(variableName);
        field.setAccessible(true);
        field.set(null, value);

        System.out.println(myVariable); // 输出：Hello World
    }

    private static String myVariable;
}