Java 构造方法学习笔记

class PoolPuzzleOne{
public static void main(String [] args){
int x = 0;
while(x<4){
System.out.println("a");       //
if(x < 1){
System.out.println("");     //
}
System.out.println("n");       //
if(x>1){
System.out.println(" oyster"); //
x = x + 2;//
}
if(x==1){
System.out.println("noys");
}
if(x<1){
System.out.println("oise");
}
System.out.println("");
x = x + 1;  //
}
}
}

/*2016-01-17*/
class poolPuzzelOne{
public static void main(String [] args){
int i=0;
for(int i=0;i<4;i++){
if(x>1)
System.out.println("oyster")
System.out.println("a");
if(i==1)
System.out.println("noys");
if(i<1)
System.out.println("oise");
}
System.out.println("");
x=x+1;
}
}
}

class TapeDeck{
boolean canRecord = flase;
void playTape(){
System.out.println("tape playing");
}
void recordTape(){
System.out.println("tape recording");
}
}
class TapeDeckTestDrive{
public static void main(String [] args){
TapeDeck t = new TapeDeck();    //新建对象
t.canRecord = ture;
t.playTape();
if(t.canRecord=ture){
t.recordTape();
}
}
}

class DVDPlayer{
boolean canRecord = false;
void recordDVD(){
System.out.println("DVD recording");
}
void playDVD(){
System.out.println("DVD playing");
}
}
class DVDPlayerTestDriver{
public static void main(String [] args){
DVDPlayer d = new DVDPlayer;
d.canRecord = ture;
d.playDVD();
if(d.canRecord == ture)
d.recordDVD();
}
}

class DrumKitDrive{
void playSnare(){
System.out.println("bang bang ba-bang");
void playTopHat(){
System.out.println("ding ding da-ding");
}
}
}
class DrumKit{
public static void main(String [] args);
DrumKit d = new DrumKit();
boolean topHot = true;
boolean snare = true;
if(d.snare==true){
d.playSnare();
}
d.snare = false;
d.playTopHat();
}

//错误，错在哪？
class DrumKitDrive{
boolean topHot = true;  // 应该放在主方法中
boolean snare = true;  // 应该放在主方法中
void playSnare(){
System.out.println("bang bang ba-bang");
void playTopHat(){
System.out.println("ding ding da-ding");
}
}
}

class DrumKit{
public static void main(String [] args);
DrumKit d = new DrumKit();
d.playSnare();
d.snare = false;
d.playTopHat();
if(d.snare==true){
d.playSnare();
}
}