1) 	private static <T> void setLengthOfLeftStack(Stack<T> leftStack,
        		Stack<T> rightStack, int newLeftLength) {
	if (leftStack.length() > newLeftLength{
		leftStack.flip();

	while(leftStack.length() > newLeftLength){
		rightStack.push(leftStack.pop());
	}
		leftStack.flip();
	}
	else if (leftStack.length() < newLeftLength){
		leftStack.flip();
	while(leftStack.length() < newLeftLength){
		leftStack.push(rightStack.pop());
	}
		leftStack.flip();
	}
	}




2) import components.sequence.Sequence;

/**
 * JUnit test fixture for {@code Sequence<String>}'s constructor and kernel
 * methods.
 *
 * @author Yaman Alslaiti
 *
 */
    // TODO - add test cases for constructor, add, remove, and length
@Test
Public final void test_empty_Constructor(){
	Sequence<String> result  = this.createFromArgsTest();
	Sequence<String> expected = this.createFromArgsRef();
	assertEquals(expected,result);
}
@Test
Public final void test_Length(){
	Sequence<String> result  = this.createFromArgsTest(“A”,”B”,”C”,”D”,”E”);
	 Int length = result.length();
	assertEquals(5,length);
}
@Test
Public final void test_empty_Length(){
	Sequence<String> result  = this.createFromArgsTest();
	Sequence<String> expected = this.createFromArgsRef();
	int length = result.length();
	assertEquals(0,length);
}
@Test
Public final void test_addEmpty(){
	Sequence<String> result  = this.createFromArgsTest();
	Sequence<String> expected = this.createFromArgsRef(“A”);
	result.add(0,”A”);
	assertEquals(expected,result);
}
@Test
Public final void test_addToLength(){
	Sequence<String> result  = this.createFromArgsTest(“A”);
	Sequence<String> expected = this.createFromArgsRef(“B”,”A”);
	result.add(0,”B”);
	assertEquals(expected,result);
}
@Test
Public final void test_addToPosition(){
	Sequence<String> result  = this.createFromArgsTest(“A”,”C”);
	Sequence<String> expected = this.createFromArgsRef(“A”,”B”,”C”);
	result.add(1,”B”);
	assertEquals(expected,result);
}
@Test
Public final void test_Remove(){
	Sequence<String> result  = this.createFromArgsTest(“A”,”B”,”C”);
	Sequence<String> expected = this.createFromArgsRef(“A”,”B”,”C”);
	String resultRemove = result.remove(0);
	String expectedRemove = expected.remove(0);
	assertEquals(expectedRemove,resultRemove);
	assertEquals(expected, result); }
@Test
Public final void test_Remove_Empty(){
	Sequence<String> result  = this.createFromArgsTest(“A”);
	Sequence<String> expected = this.createFromArgsRef();
	String resultRemove = result.remove(0);
	assertEquals(expected,result);
}

@Test
Public final void test_Remove_2(){
	Sequence<String> result  = this.createFromArgsTest(“A”);
	Sequence<String> expected = this.createFromArgsRef(“A”);
	Sequence<String> empty = this.createFromArgsRef();
	String resultRemove = result.remove(0);
	String expectedRemove = expected.remove(0);
	assertEquals(expected,result);
	assertEquals(result,empty);
}
}