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head first Java.pdf
1基本概念
2 类与对象
3 primitive 主要数据和引用
4 方法操作实例变量 对象的行为
5 编写程序
6 认识Java的API
7 继承与多态
8 接口与抽象类
9 构造器与垃圾收集器
10
数字局静态
11 异常处理
12 图形用户接口
13 Swing
14 序列化和文件的输入/ 输出
15 网络与线程
16集合与泛型
17 包、jar存档文件和部署
18 远程部署RMI
尾声
附录A
附录B
1
Java
Java
Java
write-once/run-anywhere
write-once/run-anywhere
bug
bug
Java
Java
Java
Java
1
Java
J a v a
source code for
the interactive
party invitation.
1
Method Party()
0 aload_0
1 invokespe-
cial #1
4 return
3
J a v a
2
Yo u B e t
S h o o t M e
Java
JVM
4
Java
Java
2
1
javac
Java
import java.awt.*;
import java.awt.event.*;
class Party {
public void buildInvite() {
Frame f = new Frame();
Label l = new Label(“Party at Tim’s”);
Button b = new Button(“You bet”);
Button c = new Button(“Shoot me”);
Panel p = new Panel();
p.add(l);
} // more code here...
}
1
Party.java
File Edit Window Help Plead
%javac Party.java
Method Party()
0 aload_0
File Edit Window Help Swear
%java Party
2
j a v a c
P a r t y. j a v a
Party.class
1 invokespecial #1
4 return
Method void buildInvite()
0 new #2
3 dup
4 invokespecial #3
3
Party.class
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()
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int size = 27;
String name = “Fido”;
Dog myDog = new Dog(name, size);
x = size - 5;
if (x < 15) myDog.bark(8);
while (x > 3) {
myDog.play();
}
int[] numList = {2,4,6,8};
System.out.print(“Hello”);
System.out.print(“Dog: “ + name);
String num = “8”;
int z = Integer.parseInt(num);
try {
readTheFile(“myFile.txt”);
}
catch(FileNotFoundException ex) {
System.out.print(“File not found.”);
}
Java 2Java 5.0Java
Java 5.0Java
Java 5.0Java
342
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42
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Java
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Java
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Java
Java
1.11.2
1.2
1.2
Java 2Java 34
Java 2Java 34
Java 2Java 34
4
4
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1.5
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51.5
51.5
JavaJavaJ1.02
1.021.1Java1.21.31.4Java
1.4Java
1.4Java
2 1 . 5 J a v a G 5 . 0
Java 5Tiger
4
5
Java
Sharpen your pencil
J a v a
int size = 27;
String name = “Fido”;
Dog myDog = new Dog(name, size);
x = size - 5;
if (x < 15) myDog.bark(8);
while (x > 3) {
myDog.play();
}
40
40
40
int[] numList = {2,4,6,8};
System.out.print(“Hello”);
System.out.print(“Dog: “ + name);
String num = “8”;
int z = Integer.parseInt(num);
try {
readTheFile(“myFile.txt”);
}
catch(FileNotFoundException ex) {
System.out.print(“File not found.”);
}
6
1
J a v a
public class Dog {
( .java)
(statement)
Dogbark
}
public class Dog {
void bark() {
}
}
public class Dog {
void bark() {
statement1;
statement2;
}
}
4
7
Java
Java
public static void main (String[] args) {
//
}
JavamainJava
mainJava
mainJava
Java
Java
Java
Java
main()main()
main()main()
main()main()
()
public class MyFirstApp {
public static void main (String[] args) {
System.out.print(I Rule!);
}
}
8
1
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