在CentOS 7服务器上运行的shell脚本需要将三个参数传递给Java程序，然后读取Java程序返回的布尔值，作为对这三个参数执行操作的结果。为了将布尔值返回到shell脚本中，我需要对下面的代码进行哪些具体更改？
下面是shell脚本的第一次尝试：

# !/bin/bash

ARG0=0
ARG1=0 
ARG2=0
CLASSPATH=/path/to/classes
echo -n "Enter zeroth arg: "
read ARG0
echo -n "Enter first arg: "
read ARG1
echo -n "Enter second arg: "
read ARG2
java -cp $CLASSPATH my.package.SomeClass[ARG0, ARG1, ARG2]

# How do I return the Boolean from the Java class into this shell script

下面是Java类：

public class SomeClass {

private static Boolean passes = false;

public static void main(String[] args) {
    String arg0 = null;
    String arg1 = null;
    String arg2 = null;

    for (int i = 0; i < args.length; i++){
        if(i==0){arg0=args[i];}
        if(i==1){arg1=args[i];}
        if(i==2){arg2=args[i];}
    }

    if(!arg0.equals(null) && !arg1.equals(null) && !arg2.equals(null)){
        passes = doSomeTest(arg0, arg1, arg2);
    }
    else{passes = false;}
}

public static boolean doSomeTest(String arg0, String arg1, String arg2){
    if(passes_test){return true;}
    else{return false;}
}

public static boolean getPasses(){return passes;}

}