我正在使用Netbeans 8.0.2。当我尝试运行项目时，整个系统崩溃（我没有收到任何错误）
dpkg --list | grep -i jdk
给出
ii default-jdk 2:1.7-51 amd64 Standard Java or Java compatible Development Kit
ii default-jdk-doc 0.51 all Standard Java or Java compatible Development Kit (documentation)
ii openjdk-7-doc 7u79-2.5.6-0ubuntu1.14.04.1 all OpenJDK Development Kit (JDK) documentation
ii openjdk-7-jdk:amd64 7u79-2.5.5-0ubuntu0.14.04.2 amd64 OpenJDK Development Kit (JDK)
ii openjdk-7-jre:amd64 7u79-2.5.5-0ubuntu0.14.04.2 amd64 OpenJDK Java runtime, using Hotspot JIT
ii openjdk-7-jre-headless:amd64 7u79-2.5.5-0ubuntu0.14.04.2 amd64 OpenJDK Java runtime, using Hotspot JIT (headless)
ii oracle-java8-installer 8u51+8u51arm-1~webupd8~0 all Oracle Java(TM) Development Kit (JDK) 8
欢迎任何建议。