javac: target release 1.5 conflicts with default source release 1.7

问题：

[fulinux@ubuntu rk3288-4.4.x]$ mmm frameworks/base

============================================
PLATFORM_VERSION_CODENAME=REL
PLATFORM_VERSION=4.4.4
TARGET_PRODUCT=rk3288
TARGET_BUILD_VARIANT=eng
TARGET_BUILD_TYPE=release
TARGET_BUILD_APPS=
TARGET_ARCH=arm
TARGET_ARCH_VARIANT=armv7-a-neon
TARGET_CPU_VARIANT=cortex-a15
HOST_ARCH=x86
HOST_OS=linux
HOST_OS_EXTRA=Linux-3.13.0-24-generic-x86_64-with-Ubuntu-14.04-trusty
HOST_BUILD_TYPE=release
BUILD_ID=KTU84Q
OUT_DIR=out
============================================
make: Entering directory `/home/fulinux/rk3288-4.4.x'
target Java: framework-base (out/target/common/obj/JAVA_LIBRARIES/framework-base_intermediates/classes)
javac: target release 1.5 conflicts with default source release 1.7
make: *** [out/target/common/obj/JAVA_LIBRARIES/framework-base_intermediates/classes-full-debug.jar] Error 41

make: Leaving directory `/home/fulinux/rk3288-4.4.x'

方法：

原来是因为我使用了openjdk，换成sun jdk就可以了。按照下面的方法安装：

http://www.cnblogs.com/hitwtx/archive/2011/12/06/2277830.html

我的build.sh文件内容如下：

#!/bin/bash


export JAVA_HOME=/usr/lib/jvm/jdk1.6.0_45
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=.:$JAVA_HOME/lib:$JAVA_HOME/lib/tools.jar


. build/envsetup.sh

source build.sh文件即可。