Erro Java

[Tuka21]

Criei um modpack pra versão 1.7.10 usando java 7 e o jogo não abre por esse erro, alguem sabe resolver?

 

 ummm User data ? 
[B#402]  Exception in thread "main" java.lang.UnsupportedClassVersionError: com/mojang/patchy/LegacyXMLLayout : Unsupported major.minor version 52.0
[B#402]      at java.lang.ClassLoader.defineClass1(Native Method)
[B#402]      at java.lang.ClassLoader.defineClass(Unknown Source)
[B#402]      at java.security.SecureClassLoader.defineClass(Unknown Source)
[B#402]      at java.net.URLClassLoader.defineClass(Unknown Source)
[B#402]      at java.net.URLClassLoader.access$100(Unknown Source)
[B#402]      at java.net.URLClassLoader$1.run(Unknown Source)
[B#402]      at java.net.URLClassLoader$1.run(Unknown Source)
[B#402]      at java.security.AccessController.doPrivileged(Native Method)
[B#402]      at java.net.URLClassLoader.findClass(Unknown Source)
[B#402]      at java.lang.ClassLoader.loadClass(Unknown Source)
[B#402]      at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
[B#402]      at java.lang.ClassLoader.loadClass(Unknown Source)
[B#402]      at org.apache.logging.log4j.core.config.plugins.util.PluginRegistry.decodeCacheFiles(PluginRegistry.java:181)
[B#402]      at org.apache.logging.log4j.core.config.plugins.util.PluginRegistry.loadFromMainClassLoader(PluginRegistry.java:119)
[B#402]      at org.apache.logging.log4j.core.config.plugins.util.PluginManager.collectPlugins(PluginManager.java:132)
[B#402]      at org.apache.logging.log4j.core.pattern.PatternParser.<init>(PatternParser.java:132)
[B#402]      at org.apache.logging.log4j.core.pattern.PatternParser.<init>(PatternParser.java:113)
[B#402]      at org.apache.logging.log4j.core.layout.PatternLayout.createPatternParser(PatternLayout.java:246)
[B#402]      at org.apache.logging.log4j.core.layout.PatternLayout$SerializerBuilder.build(PatternLayout.java:375)
[B#402]      at org.apache.logging.log4j.core.layout.PatternLayout.<init>(PatternLayout.java:128)
[B#402]      at org.apache.logging.log4j.core.layout.PatternLayout.<init>(PatternLayout.java:58)
[B#402]      at org.apache.logging.log4j.core.layout.PatternLayout$Builder.build(PatternLayout.java:652)
[B#402]      at org.apache.logging.log4j.core.config.AbstractConfiguration.setToDefault(AbstractConfiguration.java:577)
[B#402]      at org.apache.logging.log4j.core.config.DefaultConfiguration.<init>(DefaultConfiguration.java:47)
[B#402]      at org.apache.logging.log4j.core.LoggerContext.<init>(LoggerContext.java:86)
[B#402]      at org.apache.logging.log4j.core.selector.ClassLoaderContextSelector.createContext(ClassLoaderContextSelector.java:171)
[B#402]      at org.apache.logging.log4j.core.selector.ClassLoaderContextSelector.locateContext(ClassLoaderContextSelector.java:145)
[B#402]      at org.apache.logging.log4j.core.selector.ClassLoaderContextSelector.getContext(ClassLoaderContextSelector.java:74)
[B#402]      at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:227)
[B#402]      at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:45)
[B#402]      at org.apache.logging.log4j.LogManager.getContext(LogManager.java:174)
[B#402]      at org.apache.logging.log4j.LogManager.getLogger(LogManager.java:618)
[B#402]      at net.minecraft.launchwrapper.LogWrapper.configureLogging(LogWrapper.java:14)
[B#402]      at net.minecraft.launchwrapper.LogWrapper.log(LogWrapper.java:28)
[B#402]      at net.minecraft.launchwrapper.Launch.launch(Launch.java:94)
[B#402]      at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
[B#402] Analytics Response [runModpack]: 200
 

[JaariAtmc]

Google what this means: Unsupported major.minor version 52.0