sourcecode.txt

张孝祥的《Java就业培训教程》书中源代码

  
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《Java就业培训教程》 作者：张孝祥 书中原代码 
《Java就业培训教程》P34的Java原代码
程序清单：Promote.java
class Promote 
{
	public static void main(String args[]) 
	{
		byte b = 50;
		char c = 'a';
		short s = 1024;
		int i = 50000;
		float f = 5.67f;
		double d = .1234;
		double result = (f * b) + (i / c) - (d * s);
		System.out.println((f * b) + " + " + (i / c) + " - " + (d * s));
		System.out.println("result = " + result);
	}
}

《Java就业培训教程》P35的Java原代码
程序清单：TestScope.java
public class TestScope
{
	public static void main(String[] args)
	{
		int x = 12;           
		{
			int q = 96;  // x和q都可用
			System.out.println("x is "+x); 
			System.out.println("q is "+q);
		}
        q = x;                 /* 错误的行，只有x可用， q 超出了作用域范围 */
        System.out.println("x is "+x);      
	}
}

《Java就业培训教程》P37的Java原代码
程序清单：TestVar.java
public class TestVar
{
    public static void main(String [] args)
    {
        int x;//应改为int x=0;
        x=x+1;   //这个x由于没有初始化，编译会报错。
        System.out.println("x is "+x);
	}
}
程序清单：Func1.java
public class Func1
{
	public static void main(String [] args)
	{
 /* 下面是打印出第一个矩形的程序代码*/
		for(int i=0;i<3;i++)
		{
			for(int j=0;j<5;j++)
			{
				System.out.print("*");
			}
			System.out.println(); //换行
		}
		System.out.println();
		//下面是打印出第二个矩形的程序代码
		for(int i=0;i<2;i++)
		{
			for(int j=0;j<4;j++)
			{
				System.out.print("*");
			}
			System.out.println();
		}
		System.out.println();
		//下面是打印出第三个矩形的程序代码
		for(int i=0;i<6;i++)
		{
			for(int j=0;j<10;j++)
			{
				System.out.print("*");
			}
			System.out.println();
		}
		System.out.println();

	}
}

《Java就业培训教程》P39的Java原代码
程序清单：Func2.java
public class Func2
{
    public static void drawRectangle(int x,int y)
	{
		for(int i=0;i<x;i++)
		{
			for(int j=0;j<y;j++)
			{
				System.out.print(" * ");
			}
			System.out.println(); //换行
		}
		System.out.println();	
	}
	
	public static void main(String [] args)
	{
	    drawRectangle(3,5);
		drawRectangle(2,4);
		drawRectangle(6,10);
	}
}
《Java就业培训教程》P40的Java原代码
程序清单：Func3.java 
public class Func3
{
    public static int getArea(int x,int y)
	{
		return x*y;
	}
	
	public static void main(String [] args)
	{
		int area = getArea(3,5);
	    System.out.println("first Acreage is " + area);
	    System.out.println("second Acreage is "+ getArea(2,4));
	    getArea(6,10);
	}
｝
《Java就业培训教程》P41的Java原代码
程序清单：Func4.java
public class Func4
{
		public static int getArea(int x,int y)
		{
			if(x<=0 || y<=0)
			{
	    			return -1;
			}
			return x*y;
		}
	
		public static void main(String [] args)
		{
			int area = getArea(3,5);
			System.out.println("first Acreage is " + area);
			System.out.println("second Acreage is "+ getArea(2,4));
			getArea(6,10);
		}
}
《Java就业培训教程》P43的Java原代码
程序清单：Test.java
public class Test
{
	public static void main(String [] args)
	{
		int isum;
		double fsum;
		isum=add(3,5);
		isum=add(3,5,6);
		fsum=add(3.2,6.5); 
	}
	public static int add(int x,int y)
	{
		reutrn x+y;
	}
	public static int add(int x,int y,int z)
	{
		return x+y+z;
	}
	public static double add(double x,double y)
	{
		return x+y;
	}
}
《Java就业培训教程》P47的Java原代码
public class TestAnd
{
   public static void main(String[] args)
   {
       int x=0;
       int y=0;
       if(x!=0 && y==y/x)
	   System.out.println("y = "+y);
   }
}
《Java就业培训教程》P48的Java原代码
程序清单：ShiftTest.java
public class ShiftTest
{
	public static void main(String [] args)
	{
		int x=0x80000000;
		int y=0x80000000;
		x=x>>1;
		y=y>>>1;
		System.out.println("0x80000000>>1 = " + Integer.toHexString(x));
		System.out.println("0x80000000>>>1 = " + Integer.toHexString(y));
	}
}
《Java就业培训教程》P61的Java原代码
程序清单：TestDo.java
public class TestDo
{
	public static void main(String[] args)
	{
		int x=3;
		while(x==0)
		{
			System.out.println("ok1");
			x++;
		}
		int y=3;
		do
		{
			System.out.println("ok2");
			y++;
		}
		while(y==0);
	}
}
《Java就业培训教程》P64的Java原代码
程序清单：PrintOddNum.java
public class PrintOddNum
{
	public static void main(String [] args)
	{
       for(int i=0;i<10;i++)
       {
       	  if(i%2==0)
       	     continue;
       	  System.out.println(i);
       	}
	}
}   
《Java就业培训教程》P67的Java原代码
程序清单：TestArray.java
public class TestArray
{
    public static void main(String [] args)
    {
        int x[];
		x=new int[100];
		for(int i=0;i<100;i++)
			{
				 System.out.println("x"+i+" is "+x[i]);
			}
	}
}
《Java就业培训教程》P73的Java原代码
程序清单：TestArrayCopy.java
public class TestArrayCopy
{
	public static void main(String [] args)
	{
       int ia[]=new int[]{1,2,3,4,5};
       int ib[]=new int[]{9,8,7,6,5,4,3};
       
       System.arraycopy(ia,0,ib,0,3);
     // 复制源数组中从下标0开始的3个元素到目的数组，从下标0的位置开始存储。
       for(int i=0;i<ia.length;i++)
           System.out.print(ia[i]);
		   System.out.println();
       
       for(int j=0;j<ib.length;j++)
           System.out.print(ib[j]);
			System.out.println();
	}
}
 
   
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《Java就业培训教程》 作者：张孝祥 书中Java原代码 
《Java就业培训教程》P81的Java原代码
class Compare
{
	 public static void main(String[] args)
	  {
			String str1 = new String("abc");
			String str2 = new String("abc");
			String str3 = str1;
			if(str1==str2)
				System.out.println("str1==str2");
			else
				System.out.println("str1!=str2");	
			if(str1==str3)
				System.out.println("str1==str3");
			else
				System.out.println("str1!=str3");	
	}
}

《Java就业培训教程》P82的Java原代码
class Compare
{
	 public static void main(String[] args)
	  {
			String str1 = new String("abc");
			String str2 = new String("abc");
			String str3 = str1;
			if(str1.equals(str2))
				System.out.println("str1 equal str2");
			else
				System.out.println("str1 not equal str2");	
			if(str1.equals(str3))
				System.out.println("str1 equal str3");
			else
				System.out.println("str1 not equal str3");	
	}
}

《Java就业培训教程》P86的Java原代码
class Person
{
	private int age;
	public void setAge(int i)
	{
		if(i<0 || i>130)
			return;
		age = i; 
	}
	public int getAge()
	{ 
		return age;
	}
}
public class TestPerson
{
	public static void main(String args[])
	{
		Person p1 = new Person();
		p1.setAge(3);
		p1.setAge(-6);
		System.out.println(p1.getAge());
	}
}

《Java就业培训教程》P88的Java原代码
class Person
{
    public Person()
    {
		System.out.println("the constructor 1 is calling!");
	}
	private int age = 10;
	public void shout()
	{
		System.out.println("age is "+age); 
	}
}
class TestPerson
{
	public static void main(String[] args)
	{
		Person p1=new Person();
		p1.shout();
		Person p2=new Person();
		p2.shout();
		Person p3=new Person();
		p3.shout();
	}
}

《Java就业培训教程》P90的Java原代码
class Person
{
	private String name="unknown";
	private int age = -1;
	public Person()
	{
		System.out.println("constructor1 is calling");
	}
    public Person(String n)
	{
        name = n;
        System.out.println("constructor2 is calling");
		System.out.println("name is "+name);
    }
	public Person(String n,int a)
	{
        name = n;
        age = a;
        System.out.println("constructor3 is calling");
		System.out.println("name and age is "+name+";"+age);
    }
        public void shout()
	    {
		    System.out.println("listen to me!!"); 
		}
}
class TestPerson
{
	public static void main(String[] args)
	{
		Person p1=new Person();
		P1.shout();
		Person p2=new Person("Jack");
		P2.shout();
		Person p3=new Person("Tom",18);
		P3.shout();
	}
}
《Java就业培训教程》P94的Java原代码
class Person
{
    private Person()
    {
		System.out.println("the constructor 1 is calling!");
	}
}
class TestPerson
{
	public static void main(String[] args)
	{
		Person p1=new Person();
	}
}
《Java就业培训教程》P95的Java原代码
class A
{
	String name;
	public A(String x)
	{	
		name = x;	
	} 
	public void func1()
	{
		System.out.println("func1 of " + name +" is calling");
	}
	public void func2()
	{
		A a2 = new A("a2");
		a2.func1();
	}
}
class TestA
{
	public static void main(String [] args)
	{
		A a1 = new A("a1");
		a1.func2();
	}
}
《Java就业培训教程》P96的Java原代码
class A
{
	String name;
	public A(String x)
	{
		name = x;
	} 
	public void func1()
	{
		System.out.println("func1 of " + name +" is calling");
	}
	public void func2()
	{
		A a2 = new A("a2");
		this.func1();//使用this关键字调用func1方法
		a2.func1();
	}
}
《Java就业培训教程》P99的Java原代码
class Container
{
	Component comp;
	public void addComponent()
	{
		comp = new Component(this);//将this作为对象引用传递
	}
}
class Component
{
	Container myContainer;
	public Component(Container c)
	{
		myContainer = c;
	}
}
《Java就业培训教程》P100的Java原代码
public class Person
{
	String name;
	int age;
	public Person(String name)
	{
		 this.name = name;
	}
	public Person(String name,int age)
	{
		this(name);
		this.age = age;
	} 
}
《Java就业培训教程》P101的Java原代码
class Person
{
	public void finalize()
	{
		System.out.println("the object is going!");
	}
	public static void main(String [] args)
	{
		new Person();
		new Person();
		new Person();
		System.out.println("the program is ending!");
	}
}
《Java就业培训教程》P103的Java原代码
class PassValue
{
	public static void main(String [] args)
	{
		int x = 5;
		change(x);
		System.out.println(x);
	}
	public static void change(int x)
	{
		x = 3;
	}
}
class  PassRef
{
	int x ;
	public static void main(String [] args)
	{
		PassRef obj = new PassRef();
		obj.x = 5;
		change(obj);
		System.out.println(obj.x);
	}
	public static void change(PassRef obj)
	{
		obj.x=3;
	}
}

《Java就业培训教程》P108的Java原代码
class Chinese
{
	static String country="中国";
	String name;
	int age;
	void singOurCountry()
	{
		System.out.println("啊！，亲爱的" + country);
		//类中的成员方法也可以直接访问静态成员变量
	}
}
class TestChinese
{
	public Static void main(String [] args)
	{
		System.out.println("Chinese  country is " + Chinese.country);
		//上面的程序代码直接使用了"类名.成员"的格式
		Chinese ch1 = new Chinese();
		System.out.println("Chines country is " + ch1.country);
		//上面的程序代码直接使用了"对象名.成员"的格式
		ch1.singOurCountry();
	}
}
《Java就业培训教程》P111的Java原代码
class StaticCode
{
	static String country;
	static
	{
		country = "china";
		System.out.println("StaticCode is loading");
	}
}
class TestStaticCode
{
	static
	{
		System.out.println("TestStaticCode is loading");
	}
	public static void main(String [] args)