13518219792
打印杨辉三角图形的Java程序如下
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public class H{
public static void main(String[] args) {
int i,j,N=7;
int[][] a=new int[N][N];
for(i=0;iN;i++){
a[i][0]=1;
a[i][i]=1;
}
for(i=2;iN;i++)
for(j=1;ji;j++)
a[i][j]=a[i-1][j-1]+a[i-1][j];
for(i=0;iN;i++){
for(j=0;jN-i-1;j++){
System.out.print(" ");
}
for(j=0;ji+1;j++){
System.out.printf("%-4d",a[i][j]);
}
System.out.println();
}
}
}
public class ShowNumber {
public static void main(String[] args) {
for (int i = 2; i = 100; i = i + 2) {
System.out.print(" " + i);
}
}
}
Print.java－－打印内容定义 [code] import java.awt.*; import java.awt.event.*; import java.awt.print.*; import java.awt.image.*; import javax.swing.*; import javax.swing.event.*; import javax.swing.border.*; import javax.swing.event.*; import java.util.*; import java.io.*; public class Print implements Printable{ int m_wPage; int m_hPage; int m_orientation; Printable m_target; int maxNumPage=1; String title="数据表格打印"; Font titleFont=new Font("黑体",Font.BOLD,14); boolean hasTail=true; int tailAlign=0; int headAlign=0; int topSpace=0; int leftSpace=0; int yStart=0; int yEnd=0; int xStart=topSpace; int xEnd=0; int x=0,y=0; String strTemp="打印内容"; public void doPrint(){ try{ m_orientation=PageFormat.PORTRAIT; //设置打印对象，默认纸张 PrinterJob prnJob=PrinterJob.getPrinterJob(); PageFormat pageFormat=prnJob.defaultPage(); pageFormat.setOrientation(m_orientation); m_wPage=(int)(pageFormat.getWidth()); m_hPage=(int)(pageFormat.getHeight()); //将待打印的窗体根据默认纸张设置传入打印对象 prnJob.setPrintable(this,pageFormat); if(!prnJob.printDialog()) return; prnJob.print(); }catch(PrinterException ex){ ex.printStackTrace(); System.err.println("打印错误："+ex.toString()); } } /** * 初始化打印参数 */ public void initPrintParameter() { } /** *构造打印内容，以送打印机打印 */ public int print(Graphics pg,PageFormat pageFormat, int pageIndex) throws PrinterException{ //初始化打印参数 initPrintParameter(); //将画布设置为页面大小 pg.translate((int)pageFormat.getImageableX(), (int)pageFormat.getImageableY()); int wPage=0; int hPage=0; //根据打印机页面设置调整画布大小 if(pageFormat.getOrientation()==pageFormat.PORTRAIT){ wPage=(int)pageFormat.getImageableWidth(); hPage=(int)pageFormat.getImageableHeight(); } else{ wPage=(int)pageFormat.getImageableWidth(); wPage+=wPage/2; hPage=(int)pageFormat.getImageableHeight(); pg.setClip(0,0,wPage,hPage); } wPage=wPage-2*leftSpace; hPage=hPage-2*topSpace; xStart=leftSpace; xEnd=wPage-2; //为画布设置颜色和字体 int y=topSpace; pg.setFont(titleFont); pg.setColor(Color.black); //画标题，并使其居中 Font fn=pg.getFont(); FontMetrics fm=pg.getFontMetrics(); y+=fm.getAscent(); alignText(title,pg,y,xStart,xEnd,headAlign); y+=30; x=leftSpace+2; Font headerFont=new Font("宋体",Font.BOLD,14); pg.setFont(headerFont); fm=pg.getFontMetrics(); int h=fm.getAscent(); yStart=y-1; y+=h; pg.setFont(headerFont); fm=pg.getFontMetrics(); int header=y; h=fm.getHeight(); //计算行高，每页行数，总行数和指定页码的起始行、结束行 int rowH=Math.max(h,10); int tailH=rowH+30; int rowPerPage=0; int leftPix=0; if(hasTail){ rowPerPage=(hPage-header-tailH)/rowH; leftPix=(hPage-header-tailH)%rowH; yEnd=hPage-leftPix-tailH+2; } else{ rowPerPage=(hPage-header)/rowH; leftPix=(hPage-header)%rowH; yEnd=hPage-leftPix+2; } pg.drawString(strTemp,x,y); //画表格边框 pg.drawLine(xStart,yStart,xStart,yEnd); pg.drawLine(xStart,yStart,xEnd,yStart); pg.drawLine(xEnd,yStart,xEnd,yEnd); pg.drawLine(xStart,yEnd,xEnd,yEnd); //打印页码 if(hasTail){ int pageNumber=pageIndex+1; String s="第"+pageNumber+"页"; alignText(s,pg,yEnd+30,xStart,xEnd,tailAlign); } System.gc(); return PAGE_EXISTS; } /** * 文字排列，坐标在y处,显示范围（start-end） * 0表示居中显示，1表示左对齐，2表示右对齐 */ private void alignText(String s,Graphics pg,int y,int start, int end,int mode){ Font fn=pg.getFont(); FontMetrics fm=pg.getFontMetrics(); int wString=fm.stringWidth(s); int x=start; switch(mode) { case 0: if((end-start-wString)0) x=start+(end-start-wString)/2; break; case 1: break; case 2: if((end-start-wString)0) x=start+(end-start-wString); break; } pg.drawString(s,x,y); } public static void main(String[] args){ Print p=new Print(); p.doPrint(); } } [code] 运行方法： javac -d . Print.java java Print 自己运行一下 from:
采纳哦
