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Javet is Java + V8 (JAVa + V + EighT). It is an awesome way of embedding Node.js and V8 in Java.

There is a newer version: 4.0.0

/*
 * Copyright (c) 2021-2024. caoccao.com Sam Cao
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.caoccao.javet.values.reference.builtin;

import com.caoccao.javet.exceptions.JavetException;
import com.caoccao.javet.interop.V8Runtime;
import com.caoccao.javet.values.V8Value;
import com.caoccao.javet.values.reference.V8ValueObject;

import java.util.Objects;

/**
 * The type V8 value built-in JSON.
 *
 * @since 0.8.0
 */
@SuppressWarnings("unchecked")
public class V8ValueBuiltInJson extends V8ValueObject {
    /**
     * The constant FUNCTION_STRINGIFY.
     *
     * @since 0.8.0
     */
    public static final String FUNCTION_STRINGIFY = "stringify";

    /**
     * The constant NAME.
     *
     * @since 0.8.0
     */
    public static final String NAME = "JSON";

    /**
     * Instantiates a new V8 value built-in JSON.
     *
     * @param v8Runtime the V8 runtime
     * @param handle    the handle
     * @throws JavetException the javet exception
     * @since 0.8.0
     */
    public V8ValueBuiltInJson(V8Runtime v8Runtime, long handle) throws JavetException {
        super(v8Runtime, handle);
    }

    /**
     * Stringify string.
     *
     * @param v8Value the V8 value
     * @return the JSON string
     * @throws JavetException the javet exception
     * @since 0.8.0
     */
    public String stringify(V8Value v8Value) throws JavetException {
        Objects.requireNonNull(v8Value);
        return invokeString(FUNCTION_STRINGIFY, v8Value);
    }

    @Override
    public V8ValueBuiltInJson toClone() throws JavetException {
        return this;
    }
}