How to build Beanshell with ANT? - ant

Question

I have a task: to build this project I have a project git clone --depth 1 --branch 2.0b6 https://github.com/beanshell/beanshell.gitfrom sources whit JDK11 or report that sources are broken or report that they are incompatible with JDK 11. For that I have change build.xml to <javac target="1.8" then ran ant
And got the following error:
compile:
[javac] /home/katya/tmp_work/beanshell/build.xml:176: warning: 'includeantruntime' was not set, defaulting to build.sysclasspath=last; set to false for repeatable builds
[javac] Compiling 48 source files to /home/katya/tmp_work/beanshell/classes
[javac]
[javac] WARNING
[javac]
[javac] The -source switch defaults to 9 in JDK 9.
[javac] If you specify -target 1.8 you now must also specify -source 1.8.
[javac] Ant will implicitly add -source 1.8 for you. Please change your build file.
[javac] warning: [options] bootstrap class path not set in conjunction with -source 8
[javac] /home/katya/tmp_work/beanshell/src/bsh/util/AWTDemoApplet.java:30: warning: [deprecation] Applet in java.applet has been deprecated
[javac] import java.applet.Applet;
[javac] ^
[javac] /home/katya/tmp_work/beanshell/src/bsh/util/AWTRemoteApplet.java:30: warning: [deprecation] Applet in java.applet has been deprecated
[javac] import java.applet.Applet;
[javac] ^
[javac] /home/katya/tmp_work/beanshell/src/bsh/util/AWTConsole.java:122: warning: [deprecation] getModifiers() in InputEvent has been deprecated
[javac] type( e.getKeyCode(), e.getKeyChar(), e.getModifiers() );
[javac] ^
[javac] /home/katya/tmp_work/beanshell/src/bsh/util/AWTConsole.java:146: warning: [deprecation] CTRL_MASK in InputEvent has been deprecated
[javac] if ( (modifiers & InputEvent.CTRL_MASK) > 0 ) {
[javac] ^
[javac] /home/katya/tmp_work/beanshell/src/bsh/util/AWTConsole.java:173: warning: [deprecation] CTRL_MASK in InputEvent has been deprecated
[javac] if ( (modifiers & InputEvent.CTRL_MASK) > 0 ) {
[javac] ^
[javac] /home/katya/tmp_work/beanshell/src/bsh/util/AWTConsole.java:217: warning: TextComponentPeer is internal proprietary API and may be removed in a future release
[javac] ((java.awt.peer.TextComponentPeer)getPeer()).setCaretPosition(
[javac] ^
[javac] /home/katya/tmp_work/beanshell/src/bsh/util/AWTConsole.java:217: error: cannot find symbol
[javac] ((java.awt.peer.TextComponentPeer)getPeer()).setCaretPosition(
[javac] ^
[javac] symbol: method getPeer()
[javac] location: class AWTConsole
[javac] /home/katya/tmp_work/beanshell/src/bsh/util/AWTDemoApplet.java:38: warning: [deprecation] Applet in java.applet has been deprecated
[javac] public class AWTDemoApplet extends Applet
[javac] ^
[javac] /home/katya/tmp_work/beanshell/src/bsh/util/AWTRemoteApplet.java:39: warning: [deprecation] Applet in java.applet has been deprecated
[javac] public class AWTRemoteApplet extends Applet
[javac] ^
[javac] /home/katya/tmp_work/beanshell/src/bsh/util/JConsole.java:227: warning: [deprecation] getModifiers() in InputEvent has been deprecated
[javac] if ( (e.getModifiers() & InputEvent.CTRL_MASK) > 0 ) {
[javac] ^
[javac] /home/katya/tmp_work/beanshell/src/bsh/util/JConsole.java:227: warning: [deprecation] CTRL_MASK in InputEvent has been deprecated
[javac] if ( (e.getModifiers() & InputEvent.CTRL_MASK) > 0 ) {
[javac] ^
[javac] /home/katya/tmp_work/beanshell/src/bsh/util/JConsole.java:263: warning: [deprecation] getModifiers() in InputEvent has been deprecated
[javac] if (( (e.getModifiers() & InputEvent.CTRL_MASK) > 0 )
[javac] ^
[javac] /home/katya/tmp_work/beanshell/src/bsh/util/JConsole.java:263: warning: [deprecation] CTRL_MASK in InputEvent has been deprecated
[javac] if (( (e.getModifiers() & InputEvent.CTRL_MASK) > 0 )
[javac] ^
[javac] /home/katya/tmp_work/beanshell/src/bsh/util/JConsole.java:281: warning: [deprecation] getModifiers() in InputEvent has been deprecated
[javac] (e.getModifiers() &
[javac] ^
[javac] /home/katya/tmp_work/beanshell/src/bsh/util/JConsole.java:282: warning: [deprecation] CTRL_MASK in InputEvent has been deprecated
[javac] (InputEvent.CTRL_MASK
[javac] ^
[javac] /home/katya/tmp_work/beanshell/src/bsh/util/JConsole.java:283: warning: [deprecation] ALT_MASK in InputEvent has been deprecated
[javac] | InputEvent.ALT_MASK | InputEvent.META_MASK)) == 0 )
[javac] ^
[javac] /home/katya/tmp_work/beanshell/src/bsh/util/JConsole.java:283: warning: [deprecation] META_MASK in InputEvent has been deprecated
[javac] | InputEvent.ALT_MASK | InputEvent.META_MASK)) == 0 )
[javac] ^
[javac] /home/katya/tmp_work/beanshell/src/bsh/util/JDemoApplet.java:38: warning: [deprecation] JApplet in javax.swing has been deprecated
[javac] public class JDemoApplet extends JApplet
[javac] ^
[javac] /home/katya/tmp_work/beanshell/src/bsh/util/JRemoteApplet.java:39: warning: [deprecation] JApplet in javax.swing has been deprecated
[javac] public class JRemoteApplet extends JApplet
[javac] ^
[javac] /home/katya/tmp_work/beanshell/tests/src/InterfaceImpl.java:5: warning: [deprecation] Integer(int) in Integer has been deprecated
[javac] public Integer getInteger() { return new Integer(5); }
[javac] ^
[javac] Note: Some input files use unchecked or unsafe operations.
[javac] Note: Recompile with -Xlint:unchecked for details.
[javac] 1 error
[javac] 20 warnings
in the same time it is impossible to build this project with Maven. Could you tell me how to build beanshell version 2.0b6 with JDK 11 ?