이번 에도 또한 최대한 비슷하게 만들려고 노력...

GuavaTest1.java

package com.springapp.mvc;
import static com.google.common.base.Preconditions.*;
import static java.lang.System.err;
public class GuavaTest1 {

    private final boolean initialzed = false;

    public void testForNonNullArgument(final String parameter)
    {
        final String localPrameter = checkNotNull(parameter, "null값은"
                + "허용되지 않습니다.");
    }

    public void testDivisorNotZero(final int divisor){
        checkArgument(divisor != 0, "0으로 나눌 수 없습니다.");
    }

    public void testArrayElement(final String[] strArray,
                                 final int indexNumber){
        final int index = checkElementIndex(indexNumber, strArray.length,
                "지정된 Array 요소 위치가 벗어났습니다.");
    }

    public void testarrayPosition(final String[] strarray, final int indexNumber){
        final int index = checkPositionIndex(indexNumber, strarray.length,
                "지정된 Array 요소 위치가 벗어났습니다.");
    }

    public void testState(){
        checkState(this.initialzed, "초기화 되지 않았습니다.");
    }

    public static void printHeader(final String newHeaderText){
        err.println("\n=====================");
        err.println("===" + newHeaderText);
        err.println("=======================");
    }


    public static void main(String[] args) {
        final GuavaTest1 test1 = new GuavaTest1();


        String message = "preconditions.checkNotNull";

        printHeader(message);
        try{
            test1.testForNonNullArgument(null);
        }catch(Exception e)
        {
            e.printStackTrace();
        }


        message = "precondition.checkArgument";

        printHeader(message);
        try{
            test1.testDivisorNotZero(0);
        }catch(Exception e){
            e.printStackTrace();
        }


        message = "Preconditions.checkElementIndex";

        printHeader(message);
        try{
            test1.testArrayElement(new String[]{"Dustin","java"},3 );
        }catch(Exception e){
            e.printStackTrace();
        }


        message = "Preconditions.checkPositionIndex";

        printHeader(message);
        try{
            test1.testarrayPosition(new String[]{"Dustin","java"},3);
        }catch(Exception e){
            e.printStackTrace();
        }


        message = "Preconditions.checkState";

        printHeader(message);
        try{
            test1.testState();
        }catch(Exception e){
            e.printStackTrace();
        }
    }
}