public class RedCowForm {
    static String formName;
    RedCow cow;  //內(nèi)部類聲明對象

    RedCowForm() {
    }

    RedCowForm(String s) {
        cow = new RedCow(150, 112, 5000);
        formName = s;
    }

    public void showCowMess() {
        cow.speak();
    }

    class RedCow {  //內(nèi)部類的聲明
        String cowName = "紅牛";
        int height, weight, price;

        RedCow(int h, int w, int p) {
            height = h;
            weight = w;
            price = p;
        }

        void speak() {
            System.out.println("偶是" + cowName + ",身高:" + height + "cm 體重:" + weight + "kg,生活在" + formName);
        }
    }    //內(nèi)部類結(jié)束
}
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public class Example1_1 {
    public static void main(String[] args) {
        RedCowForm form = new RedCowForm("紅牛農(nóng)場");
        form.showCowMess();
        form.cow.speak();
    }
}

RedCowForm.RedCow redCow = new RedCowForm.RedCow(180,119,6000);
        redCow.speak();

new Bank() {
	匿名類的類體
};

abstract class OutputAlphabet {
    public abstract void output();
}

public class OutputEnglish extends OutputAlphabet { //輸出英文字母子類
    public void output(){
        for (char c='a';c<='z';c++){
            System.out.printf("%3c",c);
        }
    }
}

public class ShowBoard {
    void showMess(OutputAlphabet show) { //參數(shù)show是OutputAlphabet類型的對象
        show.output();
    }
}

public class Example2_1 {
    public static void main(String[] args) {
        ShowBoard board = new ShowBoard();
        board.showMess(new OutputEnglish());//向參數(shù)傳遞OutputAlphabet的子類OutputEnglish的對象

        board.showMess(new OutputAlphabet() {   //向參數(shù)傳遞OutputAlphabet的匿名子類的對象
            @Override
            public void output() {
                for (char c = 'α'; c <= 'ω'; c++)  //輸出希臘字母
                    System.out.printf("%3c", c);
            }
        });//分號在這里
    }
}

new Computable(){
	實現(xiàn)接口的匿名類的類體
};

interface SpeakHello {
    void speak();
}

class HelloMachine {
    public void turnOn(SpeakHello hello) {
        hello.speak();
    }
}

public class Example7_3 {
    public static void main(String[] args) {
        HelloMachine machine = new HelloMachine();
        machine.turnOn(new SpeakHello() {
            @Override
            public void speak() {
                System.out.println("hello,you are welcome!");
            }
        });
        machine.turnOn(new SpeakHello() {
            @Override
            public void speak() {
                System.out.println("你好，歡迎光臨!");
            }
        });
    }
}

public String getMessage();
public void printStackTrace();
public String toString();

try{
	包含可能發(fā)生異常的語句
}
catch(ExceptionSubClass1 e){
	...
}
catch(ExceptionSubClass2 e){
	...
}

public class Example3_1 {
    public static void main(String[] args) {
        int n = 0, m = 0, t = 1000;

        try {
            m = Integer.parseInt("8888");
            n = Integer.parseInt("ab89"); //發(fā)生異常,轉(zhuǎn)向catch
            t = 7777;  //t沒有機會被賦值
        } catch (NumberFormatException e) {
            System.out.println("發(fā)生異常:" + e.getMessage());
        }
        System.out.println("n=" + n + ",m=" + m + ",t=" + t);

        try {
            System.out.println("故意拋出I/O異常！");
            throw new java.io.IOException("我是故意的");
            //System.out.println("這個輸出語句肯定沒有機會執(zhí)行,所以必須注釋掉，否則編譯出錯");
        } catch (java.io.IOException e) {
            System.out.println("發(fā)生異常:" + e.getMessage());
        }
    }
}

try{ }
catch(ExceptionSubClass e){ }
finally{}

public class BankException extends Exception {
    String message;

    public BankException(int m, int n) {
        message = "入賬資金" + m + "是負數(shù)或支出" + n + "是正數(shù)，不符合系統(tǒng)要求.";
    }

    public String warnMess() {
        return message;
    }
}

public class Bank {
    private int money;

    public void income(int in, int out) throws BankException {
        if (in <= 0 || out >= 0 || in + out <= 0) {
            throw new BankException(in, out); //方法拋出異常，導致方法結(jié)束
        }
        int netIncome = in + out;
        System.out.printf("本次計算出的純收入是:%d元\n", netIncome);
        money = money + netIncome;
    }

    public int getMoney() {
        return money;
    }
}

public class Example3_2 {
    public static void main(String[] args) {
        Bank bank = new Bank();
        try {
            bank.income(200, -100);
            bank.income(300, -100);
            bank.income(400, -100);
            System.out.printf("銀行目前有%d元\n", bank.getMoney());
            bank.income(200, 100);
            bank.income(99999, -100);
        } catch (BankException e) {
            System.out.println("計算收益的過程出現(xiàn)如下問題:");
            System.out.println(e.warnMess());
        }
        System.out.printf("銀行目前有%d元\n", bank.getMoney());
    }
}

public class DangerException extends Exception {
    final String message = "超重";
    public String warnMess() {
        return message;
    }
}

public class CargoBoat {
    int realContent;  //裝載的重量
    int maxContent;   //最大裝載量
    public void setMaxContent(int c) {
        maxContent = c;
    }
    public void loading(int m) throws DangerException {
        realContent += m;
        if(realContent>maxContent) {
            throw new DangerException();
        }
        System.out.println("目前裝載了"+realContent+"噸貨物");
    }
}

public class Example5 {
    public static void main(String[] args) {
        CargoBoat ship = new CargoBoat();
        ship.setMaxContent(1000);
        int m =600;
        try{
            ship.loading(m);
            m = 400;
            ship.loading(m);
            m = 367;
            ship.loading(m);
            m = 555;
            ship.loading(m);
        }
        catch(DangerException e) {
            System.out.println(e.warnMess());
            System.out.println("無法再裝載重量是"+m+"噸的集裝箱");
        }
        finally {
            System.out.printf("貨船將正點啟航");
        }
    }
}