String str; 

str = new string("GO WSU WARRIORS!");

import java.util;

import java.text.DateFormat;

import java.lang;

double x = 1;

double y = 1;

double answer;

answer = Math.sqrt(x+(4*(yMath.pow(3))));

1. Import Statements
2. Class comment
3. Class name
4. Data members
5. Methods

code that is repeated until conditions/statements become true. 

while(...){

}

same as while except while is at the end and starts out with do. 

do(code that repeats) {

}

while(...statement);

for(i=0;i<100;i++){

}

for(;;);

keeps track of the number or repetition and can also offer a way for code to stop once it reaches a certain number. 

Sentinel loop repeats until a condition is met, which may never occur. 

double myarray[]

new double [40];

int [][]

mal= new int [4][5];

for (int i=0; i<4; i++)

for (int j=0; j<5; j++);

mal [i][j]=1;

Steps to a 2D Matrix Array Program

1. Declare m and n as static ints and set to values. 
2. create load array
3. create print array
4. create add array
5. create multiply array
6. create main 

public static void loadMatrix(int[][] A)

{

for (int Row = 0; Row length; Row++)

{

for (int Col = 0; Col length; Col++)

{

A[Row][Col] = (int)((Math.random()* 6 -3));

}

}

}

public static void printMatrix(int[][] A, int n)

{

System.out.println();

for (int Row = 1; Row <= n; Row++)

{

for (int Col = 1; Col <= n; Col++)

{

System.out.print(Format.rightAlign(6,A[Row][Col]));

}

System.out.println();

}

System.out.println();

}

public static void MatrixAdd (int A [][], int B [][], int C [][], int n)

{

for(int Row = 0; Row <= n; Row ++)

{

for (int Col = 0; Col <= n; Col ++)

{

C[Row][Col] = A[Row][Col] + B[Row][Col];

}

}

}

public static void MatrixMult(int A[][], int B[][], int C[][], int m)

{

for(int i=1; i<=m;i++)

{

for(int Row=1; Row<=m;Row++)

{

for(int Col= 1; Col<=m; Col++)

{

C[Row][Col]=0;

C[Row][Col]= A[Row][i]*B[i][Col]+C[Row][Col];

}

}

}

}

public static void main(String[] args) 

{

int[][]D = new int[10][10];

int[][]E = new int[10][10];

int[][]F = new int[10][10];

loadMatrix(D);

loadMatrix(E);

printMatrix(D, n);

printMatrix(E, n);

MatrixAdd(D,E,F, n);

printMatrix(F, n);

MatrixMult(D,E,F, m);

printMatrix(F, n);

}

• positive (leftmost bit is 0): as in binary to decimal
•  negative (leftmost bit is 1): convert the number to its positive by flipping all the bits, then convert as in binary to decimal, then put a minus sign in front of it.

Declaration of the object involves only creating the reference variable to the object.

Example:

class SampleClass{ }

Object Declaration:

SampleClass obj1;

Object Creation:

Creating an object involves use of new keyword and actually allocating memory for that object.

SampleClass obj2 = new SampleClass ();

1. What does it do? 
2. What does it "know"?
3. Draw a box for each method and put the input(s) (if any) and output (if any) on each box. Write the heading for each method
4. Design the constructors. (keep in mind what a constructor does, creates the object and sets the data items to something reasonable)
5. Write the heading for each constructer with comments. 

charAt(position that number is in starting at 0)

or 

substring(<number>,<number>)

Math.

PI()
random()
sqrt()
abs()
max (x,y)
cos, tan and sin()
acos, atan, asin (*arc of sin, cosine and tangent)
pow(x,y)

min()

cbrt()

DecimalFormat df = new DecimalFormat("0.00");

System.out.print("Currency is: " + df.format(currency));

GregorianCalendar today = new GregorianCalendar();

or specific date

GregorianCalender independenceDay = new GregorianCalendar(1776, 6, 4);

Switch Class {

Case 1: <expression>

Case 2: <expression>

<default> 

break;

}

Scanner

• declare scanner
• create scanner (scanner=new Scanner(system.in);)
• firstName = scanner.next();

1. Import Values
2. Data Values
3. Define Class(es)
4. Define Methods
5. Pseudo Code

• classes
• objects
• messages (when you tell something what to do. Ex: get obstable distance. getters/setters)
• methods

double.parseDouble();

or 

int.parseInt();

self referencing pointer because it is used to refer the recieving object of a message from within the method. *method-only thing

example:

a = this.getNumerator();

Study 6.7 Pg.326