TR=`which tr`
if [ -z “UNAME"−o−z"UNAME" -o -z "UNAME"−o−z"GREP” -o -z “CUT"−o−z"CUT" -o -z "CUT"−o−z"MKTEMP” -o -z “RM"−o−z"RM" -o -z "RM"−o−z"CAT” -o -z “$TR” ]; then
message “Required tools are missing - check beginning of \”$0\" file for details."
exit 1
fi
OS_TYPE=`“$UNAME” -s`
# ---------------------------------------------------------------------
# Ensure IDE_HOME points to the directory where the IDE is installed.
# ---------------------------------------------------------------------
SCRIPT_LOCATION=$0
if [ -x “$READLINK” ]; then
while [ -L “$SCRIPT_LOCATION” ]; do
SCRIPT_LOCATION=`“READLINK"−e"READLINK" -e "READLINK"−e"SCRIPT_LOCATION”`
done
fi
IDE_BIN_HOME=`dirname “$SCRIPT_LOCATION”`
if [ “$IDE_BIN_HOME” = “.” ]; then
IDE_HOME=“…”
else
IDE_HOME=`dirname “$IDE_BIN_HOME”`
fi
# ---------------------------------------------------------------------
# Locate a JDK installation directory which will be used to run the IDE.
# Try (in order): STUDIO_JDK, studio.jdk, …/jre, JDK_HOME, JAVA_HOME, “java” in PATH.
# ---------------------------------------------------------------------
JDK=“”
if isJDK $STUDIO_JDK; then
JDK=“$STUDIO_JDK”
fi
if [ “KaTeX parse error: Can't use function '\]' in math mode at position 11: JDK" = "" \̲]̲ && \[ -s "HOME/.AndroidStudio3.0/config/studio.jdk” ]; then
JDK=`“$CAT” $HOME/.AndroidStudio3.0/config/studio.jdk`
if [ ! -d “$JDK” ]; then
JDK=“IDE_HOME/IDE\_HOME/IDE_HOME/JDK”
fi
if ! isJDK $JDK; then
JDK=“”
fi
fi
if [ “KaTeX parse error: Can't use function '\]' in math mode at position 11: JDK" = "" \̲]̲ && \[ "OS_TYPE” = “Linux” ] &&
[ -x “KaTeX parse error: Can't use function '\]' in math mode at position 25: …/jre/bin/java" \̲]̲ && "IDE_HOME/jre/bin/java” -version > /dev/null 2>&1 ; then
JDK=“$IDE_HOME/jre”
fi
if [ “$JDK” = “” ] && isJDK $JDK_HOME; then
JDK=“$JDK_HOME”
fi
if [ “$JDK” = “” ]; then
if isJDK $JAVA_HOME; then
JDK=“$JAVA_HOME”
else
JAVA_BIN_PATH=`which java`
if [ -n “$JAVA_BIN_PATH” ]; then
if [ “OS_TYPE"="FreeBSD"−o"OS\_TYPE" = "FreeBSD" -o "OS_TYPE"="FreeBSD"−o"OS_TYPE” = “MidnightBSD” ]; then
JAVA_LOCATION=`JAVAVM_DRYRUN=yes java | “GREP"′JAVA_HOME′∣"GREP" '^JAVA\_HOME' | "GREP"′JAVA_HOME′∣"CUT” -c11-`
if [ -x “$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=“$JAVA_LOCATION”
fi
fi
fi
if [ -z “JDK"−a−x"JDK" -a -x "JDK"−a−x"READLINK” -a -x “XARGS"−a−x"XARGS" -a -x "XARGS"−a−x"DIRNAME” ]; then
JAVA_LOCATION=`“READLINK"−f"READLINK" -f "READLINK"−f"JAVA_BIN_PATH”`
case “$JAVA_LOCATION” in
*/jre/bin/java)
JAVA_LOCATION=`echo “JAVA_LOCATION"∣"JAVA\_LOCATION" | "JAVA_LOCATION"∣"XARGS” “DIRNAME"∣"DIRNAME" | "DIRNAME"∣"XARGS” “DIRNAME"∣"DIRNAME" | "DIRNAME"∣"XARGS” “$DIRNAME”`
if [ ! -d “$JAVA_LOCATION/bin” ]; then
JAVA_LOCATION=“$JAVA_LOCATION/jre”
fi
;;
*)
JAVA_LOCATION=`echo “JAVA_LOCATION"∣"JAVA\_LOCATION" | "JAVA_LOCATION"∣"XARGS” “DIRNAME"∣"DIRNAME" | "DIRNAME"∣"XARGS” “$DIRNAME”`
;;
esac
if [ -x “$JAVA_LOCATION/bin/java” ]; then
JDK=“$JAVA_LOCATION”
fi
fi
fi
fi
JAVA_BIN=“$JDK/bin/java”
if [ ! -x “$JAVA_BIN” ]; then
JAVA_BIN=“$JDK/jre/bin/java”
fi
if [ -z “KaTeX parse error: Can't use function '\]' in math mode at position 6: JDK" \̲]̲ || \[ ! -x "JAVA_BIN” ]; then
message “No JDK found. Please validate either STUDIO_JDK, JDK_HOME or JAVA_HOME environment variable points to valid JDK installation.”
exit 1
fi
VERSION_LOG=`“$MKTEMP” -t java.version.log.XXXXXX`
JAVA_TOOL_OPTIONS= “JAVA_BIN"−version2>"JAVA\_BIN" -version 2> "JAVA_BIN"−version2>"VERSION_LOG”
“GREP""64−Bit∣x86_64∣amd64""GREP" "64-Bit|x86\_64|amd64" "GREP""64−Bit∣x86_64∣amd64""VERSION_LOG” > /dev/null
BITS=$?
“RM"−f"RM" -f "RM"−f"VERSION_LOG”
test ${BITS} -eq 0 && BITS=“64” || BITS=“”
# ---------------------------------------------------------------------
# Collect JVM options and IDE properties.
# ---------------------------------------------------------------------
if [ -n “$STUDIO_PROPERTIES” ]; then
IDE_PROPERTIES_PROPERTY=“-Didea.properties.file=$STUDIO_PROPERTIES”
fi
VM_OPTIONS=“”
VM_OPTIONS_FILES_USED=“”
for vm_opts_file in “IDE_BIN_HOME/studioIDE\_BIN\_HOME/studioIDE_BIN_HOME/studioBITS.vmoptions” “OS_SPECIFIC_BIN_DIR/studioOS\_SPECIFIC\_BIN\_DIR/studioOS_SPECIFIC_BIN_DIR/studioBITS.vmoptions” “HOME/.AndroidStudio3.0/studioHOME/.AndroidStudio3.0/studioHOME/.AndroidStudio3.0/studioBITS.vmoptions” “$STUDIO_VM_OPTIONS”; do
if [ -r “$vm_opts_file” ]; then
VM_OPTIONS_DATA=`“CAT""CAT" "CAT""vm_opts_file” | “KaTeX parse error: Expected group after '^' at position 11: GREP" -v "^̲#.\*" | "TR” ‘\n’ ’ '`
VM_OPTIONS=“$VM_OPTIONS $VM_OPTIONS_DATA”
if [ -n “$VM_OPTIONS_FILES_USED” ]; then
VM_OPTIONS_FILES_USED=“$VM_OPTIONS_FILES_USED,”
fi
VM_OPTIONS_FILES_USED=“VM_OPTIONS_FILES_USEDVM\_OPTIONS\_FILES\_USEDVM_OPTIONS_FILES_USEDvm_opts_file”
fi
done
IS_EAP=“false”
if [ “$IS_EAP” = “true” ]; then
OS_NAME=`echo “OS_TYPE"∣"OS\_TYPE" | "OS_TYPE"∣"TR” ‘[:upper:]’ ‘[:lower:]’`
AGENT_LIB=“yjpagent-OS_NAMEOS\_NAMEOS_NAMEBITS”
if [ -r “IDE_BIN_HOME/libIDE\_BIN\_HOME/libIDE_BIN_HOME/libAGENT_LIB.so” ]; then
AGENT=“-agentlib:$AGENT_LIB=disablealloc,delay=10000,probe_disable=*,sessionname=AndroidStudio3.0”
fi
fi
CLASSPATH=“$IDE_HOME/lib/bootstrap.jar”
CLASSPATH=“CLASSPATH:CLASSPATH:CLASSPATH:IDE_HOME/lib/extensions.jar”
CLASSPATH=“CLASSPATH:CLASSPATH:CLASSPATH:IDE_HOME/lib/util.jar”
最后
光给面试题不给答案不是我的风格。这里面的面试题也只是凤毛麟角，还有答案的话会极大的增加文章的篇幅，减少文章的可读性
Java面试宝典2021版
最常见Java面试题解析（2021最新版）
2021企业Java面试题精选
21版
[外链图片转存中…(img-wbd6dDp8-1719165527678)]
[外链图片转存中…(img-Ls6xOCYm-1719165527678)]
最常见Java面试题解析（2021最新版）
[外链图片转存中…(img-v7kqmy7s-1719165527679)]
[外链图片转存中…(img-KmrWPpbN-1719165527679)]
2021企业Java面试题精选
[外链图片转存中…(img-fXZIwOsG-1719165527680)]
[外链图片转存中…(img-AjULVnYn-1719165527681)]
