Hello im trying to make a mod and the past few days GSON has almost killed me, when i export the mod and then launch it through minecraft launcher i get

java.lang.NoSuchMethodError: com.google.gson.JsonParser.parseString(Ljava/lang/String;)Lcom/google/gson/JsonElement;

i have literally tried everything here is my build config
 

dependencies {
    minecraft("com.mojang:minecraft:1.8.9")
    mappings("de.oceanlabs.mcp:mcp_stable:22-1.8.9")
    forge("net.minecraftforge:forge:1.8.9-11.15.1.2318-1.8.9")

    compileOnly("cc.polyfrost:oneconfig-1.8.9-forge:0.2.2-alpha+")
    shadowImpl("cc.polyfrost:oneconfig-wrapper-launchwrapper:1.0.0-beta+") {
        isTransitive = false
        exclude(module = "gson")
    }

    shadowImpl("org.spongepowered:mixin:0.7.11-SNAPSHOT") {
        isTransitive = false
        exclude(module = "gson")
    }
    annotationProcessor("org.spongepowered:mixin:0.8.5-SNAPSHOT")

    shadowImpl("org.javassist:javassist:3.15.0-GA") {
        isTransitive = false
        exclude(module = "gson")
    }
    shadowImpl("com.neovisionaries:nv-i18n:1.28") {
        isTransitive = false
        exclude(module = "gson")
    }

    shadowImpl("org.apache.commons:commons-lang3:3.4") {
        isTransitive = false
        exclude(module = "gson")
    }
    shadowImpl("org.apache.httpcomponents:httpcore:4.4.5") {
        isTransitive = false
        exclude(module = "gson")
    }

    compileOnly("com.google.code.gson:gson:2.8.6") { isTransitive = false }

    configurations.all { resolutionStrategy { force("com.google.code.gson:gson:2.8.6") } }
    shadowImpl(fileTree(
        mapOf(
            "dir" to "libs",
            "include" to listOf("*.jar"),
            "exclude" to listOf(
                "asm",
                "asm-commons",
                "asm-tree",
                "gson",
                "unspecified",
                "nv-i18n"
            )
        )
    ))
}

 

The conflict arises from discrepancies between different versions of GSON.

My suggestion would be to remove your dependency on GSON 2.8.6 and opt for a different approach. Instead of using the static method JsonParser.parseString, you can create a JsonParser object and then use the parse method.

 

JsonParser jsonParser = new JsonParser();
jsonParser.parse(jsonString)

 

Edited April 16, 20241 yr by bluedisgusted
-

@bluedisgusted That actually fully fixed it, thank you so much