java - Intellij Idea 使用什么 JVM 启动？

Question

我是一名 Eclipse 用户，最近决定试用 Intellij Idea。我的操作系统是 Ubuntu 12。

使用 Eclipse 时，通过在 eclipse.ini (http://wiki.eclipse.org/Eclipse.ini#Specifying_the_JVM) 中指定，可以轻松选择用于启动 Eclipse 的 JVM。但是我找不到 Intellij Idea 12 这样的东西。

因此，我有两个问题:

1. Intellij Idea 如何确定使用哪个 JVM 来启动自身？
2. 有没有办法覆盖此默认行为？

谢谢。

Answer 1

从你运行的idea.sh

# ---------------------------------------------------------------------
# Locate a JDK installation directory which will be used to run the IDE.
# Try (in order): IDEA_JDK, JDK_HOME, JAVA_HOME, "java" in PATH.
# ---------------------------------------------------------------------
if [ -n "$IDEA_JDK" -a -x "$IDEA_JDK/bin/java" ]; then
  JDK="$IDEA_JDK"
elif [ -n "$JDK_HOME" -a -x "$JDK_HOME/bin/java" ]; then
  JDK="$JDK_HOME"
elif [ -n "$JAVA_HOME" -a -x "$JAVA_HOME/bin/java" ]; then
  JDK="$JAVA_HOME"
else
  JAVA_BIN_PATH=`which java`
  if [ -n "$JAVA_BIN_PATH" ]; then
    if [ "$OS_TYPE" = "FreeBSD" ]; then
      JAVA_LOCATION=`JAVAVM_DRYRUN=yes java | "$GREP" '^JAVA_HOME' | "$CUT" -c11-`
      if [ -x "$JAVA_LOCATION/bin/java" ]; then
        JDK="$JAVA_LOCATION"
      fi
    elif [ "$OS_TYPE" = "SunOS" ]; then
      JAVA_LOCATION="/usr/jdk/latest"
      if [ -x "$JAVA_LOCATION/bin/java" ]; then
        JDK="$JAVA_LOCATION"
      fi
    elif [ "$OS_TYPE" = "Darwin" ]; then
      JAVA_LOCATION=`/usr/libexec/java_home`
      if [ -x "$JAVA_LOCATION/bin/java" ]; then
        JDK="$JAVA_LOCATION"
      fi
    fi

    if [ -z "$JDK" -a -x "$READLINK" ]; then
      JAVA_LOCATION=`"$READLINK" -f "$JAVA_BIN_PATH"`
      case "$JAVA_LOCATION" in
        */jre/bin/java)
          JAVA_LOCATION=`echo "$JAVA_LOCATION" | xargs dirname | xargs dirname | xargs dirname` ;;
        *)
          JAVA_LOCATION=`echo "$JAVA_LOCATION" | xargs dirname | xargs dirname` ;;
      esac
      if [ -x "$JAVA_LOCATION/bin/java" ]; then
        JDK="$JAVA_LOCATION"
      fi
    fi
  fi
fi