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();

        
        
        
        printHeader("preconditions.checkNotNull");
        try{
            test1.testForNonNullArgument(null);
        }catch(NullPointerException npe)
        {
            npe.printStackTrace();
        }
        
        
        
        
        printHeader("precondition.checkArgument");
        try{
            test1.testDivisorNotZero(0);
        }catch(IllegalArgumentException illArgEx){
            illArgEx.printStackTrace();
        }
        
        
        
        printHeader("Preconditions.checkElementIndex");
        try{
            test1.testArrayElement(new String[]{"Dustin","java"},3 );
        }catch(IndexOutOfBoundsException ioobEx){
            ioobEx.printStackTrace();
        }
        
        
        
        printHeader("Preconditions.checkPositionIndex");
        try{
            test1.testarrayPosition(new String[]{"Dustin","java"},3);
        }catch(IndexOutOfBoundsException ioobex){
            ioobex.printStackTrace();
        }
        
        
        
        printHeader("Preconditions.checkState");
        try{
            test1.testState();
        }catch(IllegalStateException illStateEx){
            illStateEx.printStackTrace();
        }
    }
}

중복인 눈에 들어왔고 일단 중복단위로 경계를 나누어 보았음 ..