Minecraft Forums

So I have been trying ALL day to play minecraft classic at https://minecraft.net/classic/play and I kept getting certificate errors. So I fixed much of it but one thing failed! i get the message: "Failed To validate certifficate application will not be executed" and the minecraft screen gets stuck at: "MINECRAFT switching applet..."

Os: Windows
Browser: Mozilla Firefox
Java version: Standard Edition version 7 Udate 55 (build 1.7.0_55-b14
Detailed report:
java.lang.SecurityException: unexpected excpetion
at com.sun.deploy.security.ruleset.RuleId.pathIncludes(Unknown Source)
at com.sun.deploy.security.ruleset.RuleId.compareStringToURL(Unknown Source)
at com.sun.deploy.security.ruleset.RuleId.onExceptionList(Unknown Source)
at com.sun.deploy.security.ruleset.RuleId.isException(Unknown Source)
at com.sun.deploy.security.ruleset.DeploymentRuleSet.getDefaultOrException(Unknown Source)
at com.sun.deploy.security.ruleset.DeploymentRuleSet.getDRS(Unknown Source)
at com.sun.deploy.security.ruleset.DeploymentRuleSet.findDRS(Unknown Source)
at sun.plugin2.applet.Applet2Manager.getMainDeploymentRuleSet(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.getDeploymentRuleSet(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.isTrustedByTrustDecider(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.getPermissions(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.getPermissions(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.lwjgl.util.applet.AppletLoader$3.getPermissions(AppletLoader.java:713)
at java.security.SecureClassLoader.getProtectionDomain(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at org.lwjgl.util.applet.AppletLoader.switchApplet(AppletLoader.java:755)
at org.lwjgl.util.applet.AppletLoader.run(AppletLoader.java:644)
at java.lang.Thread.run(Unknown Source)
Caused by: java.net.URISyntaxException: Relative path in absolute URI: file://C:/Users/Riley/AppData/Local/Temp//minecraft.net/Minecraft/minecraft.jar
at java.net.URI.checkPath(Unknown Source)
at java.net.URI.<init>(Unknown Source)
at java.net.URI.<init>(Unknown Source)
... 30 more







So can anyone tell me what's wrong?

Same thing here , I can't find a single solution.

Failed to validate certificate. The application will not be executed. Name:org.lwjgl.util.applet.AppletLoader Location: file:// .. More Information // General Exception details: java.lang.SecurityException: unexpected excpetion
at com.sun.deploy.security.ruleset.RuleId.pathIncludes(Unknown Source)
at com.sun.deploy.security.ruleset.RuleId.compareStringToURL(Unknown Source)
at com.sun.deploy.security.ruleset.RuleId.onExceptionList(Unknown Source)
at com.sun.deploy.security.ruleset.RuleId.isException(Unknown Source)
at com.sun.deploy.security.ruleset.DeploymentRuleSet.getDefaultOrException(Unknown Source)
at com.sun.deploy.security.ruleset.DeploymentRuleSet.getDRS(Unknown Source)
at com.sun.deploy.security.ruleset.DeploymentRuleSet.findDRS(Unknown Source)
at sun.plugin2.applet.Applet2Manager.getMainDeploymentRuleSet(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.getDeploymentRuleSet(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.isTrustedByTrustDecider(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.getPermissions(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.getPermissions(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.lwjgl.util.applet.AppletLoader$3.getPermissions(AppletLoader.java:713)
at java.security.SecureClassLoader.getProtectionDomain(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at org.lwjgl.util.applet.AppletLoader.switchApplet(AppletLoader.java:755)
at org.lwjgl.util.applet.AppletLoader.run(AppletLoader.java:644)
at java.lang.Thread.run(Unknown Source)
Caused by: java.net.URISyntaxException: Relative path in absolute URI: file://C:/Users/easyhome/AppData/Local/Temp//minecraft.net/Minecraft/minecraft.jar
at java.net.URI.checkPath(Unknown Source)
at java.net.URI.<init>(Unknown Source)
at java.net.URI.<init>(Unknown Source)
... 30 more

My dad would kill me If I downgraded java. But how would I even change what version of java I use WITH java installed.

D: