» CS 145 Lecture 4

CS 145 Lecture 4 – Types

September 10, 2014 by Chris Johnson. Filed under cs145, fall 2014, lectures.

Agenda

what ?s
lab impressions
office hours
what’s wrong with this
types
switching types

What’s Wrong With This

```
int a = 5;
int b = 6;
int a = 7;
```
show
```
System.out.println("I'm ", 5);
```
show
```
int i = 100 * 0.5;
```
show

Code

Declassignments.java

package lecture0910;

public class Declassignments {
  public static void main(String[] args) {
//    int a;
//    System.out.println(a);
    
//    System.out.printf("I'm %d", 5);
    
    System.out.println('\u265b');
    System.out.println('\u2603');
    System.out.println('\u2672');
    System.out.println('\u2697');
    System.out.println('\u266A');
    System.out.println('\u2682');

    byte b = 127;
    short s = b;
    
    b = (byte) s;
    
    int i = (int) (100 * 0.5);
    System.out.println(i);
  }
}

Haiku

show