《Java就業培訓教程》P34源碼
程序清單：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就業培訓教程》P35源碼
程序清單：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;                 /* 錯誤的行，只有x可用， q 超出了作用域范圍 */
        System.out.println("x is "+x);      
	}
}

《Java就業培訓教程》P37源碼
程序清單：TestVar.java
public class TestVar
{
    public static void main(String [] args)
    {
        int x;//應改為int x=0;
        x=x+1;   //這個x由于沒有初始化，編譯會報錯。
        System.out.println("x is "+x);
	}
}
程序清單：Func1.java
public class Func1
{
	public static void main(String [] args)
	{
 /* 下面是打印出第一個矩形的程序代碼*/
		for(int i=0;i<3;i++)
		{
			for(int j=0;j<5;j++)
			{
				System.out.print("*");
			}
			System.out.println(); //換行
		}
		System.out.println();
		//下面是打印出第二個矩形的程序代碼
		for(int i=0;i<2;i++)
		{
			for(int j=0;j<4;j++)
			{
				System.out.print("*");
			}
			System.out.println();
		}
		System.out.println();
		//下面是打印出第三個矩形的程序代碼
		for(int i=0;i<6;i++)
		{
			for(int j=0;j<10;j++)
			{
				System.out.print("*");
			}
			System.out.println();
		}
		System.out.println();

	}
}

《Java就業培訓教程》P39源碼
程序清單：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(); //換行
		}
		System.out.println();	
	}
	
	public static void main(String [] args)
	{
	    drawRectangle(3,5);
		drawRectangle(2,4);
		drawRectangle(6,10);
	}
}
《Java就業培訓教程》P40源碼
程序清單：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就業培訓教程》P41源碼
程序清單：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就業培訓教程》P43源碼
程序清單：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就業培訓教程》P47源碼
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就業培訓教程》P48源碼
程序清單：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就業培訓教程》P61源碼
程序清單：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就業培訓教程》P64源碼
程序清單：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就業培訓教程》P67源碼
程序清單：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就業培訓教程》P73源碼
程序清單：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);
     // 復制源數組中從下標0開始的3個元素到目的數組，從下標0的位置開始存儲。
       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();
	}
}