实现效果
问题是没有很好的换行
在调用时显示想处理的字符
实现代码
Main.java
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public class Main {
public static void main(String[] strings) { String poem = "破阵子·为陈同甫赋壮词以寄之\r\n" + "作者：辛弃疾\r\n" + "\r\n" + "醉里挑灯看剑，梦回吹角连营。八百里分麾下炙，五十弦翻塞外声，沙场秋点兵。\r\n" + "马作的卢飞快，弓如霹雳弦惊。了却君王天下事，赢得生前身后名。可怜白发生！";
AlgoFrame frame = new AlgoFrame("Java",poem, 600, 600); System.out.print("行路难，行路难，多歧路，今安在？\n" + "醉里挑灯看剑，梦回吹角连营"); } } |
AlgoFrame.java
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import java.awt.BasicStroke; import java.awt.Color; import java.awt.Dimension; import java.awt.Font; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.geom.Ellipse2D; import java.awt.geom.Rectangle2D;
import javax.swing.*;
public class AlgoFrame extends JFrame { private int canvasWidth; private int canvasHeight; public AlgoFrame(String title, String poem, int canvasWidth, int canvasHeight){
super(title);
this.canvasHeight = canvasHeight; this.canvasWidth = canvasWidth;
// AlgoCanvas canvas = new AlgoCanvas(); AlgoCanvas canvas = new AlgoCanvas(poem);
setContentPane(canvas); pack();
setResizable(false); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setVisible(true); }
public AlgoFrame(String title){ this(title, "", 1024, 768); }
public int getCanvasWidth(){return canvasWidth;} public int setCanvasHeight() {return canvasHeight;}
private class AlgoCanvas extends JPanel{
Font pf = new Font("Helvetica", Font.BOLD,20); String poem = "";
// String poem = "破阵子·为陈同甫赋壮词以寄之\r\n" // + "作者：辛弃疾\r\n" // + "\r\n" // + "醉里挑灯看剑，梦回吹角连营。八百里分麾下炙，五十弦翻塞外声，沙场秋点兵。\r\n" // + "马作的卢飞快，弓如霹雳弦惊。了却君王天下事，赢得生前身后名。可怜白发生！";
public AlgoCanvas (String strs) { this.poem = strs; }
@Override public void paintComponent(Graphics gra) {
Graphics2D graphics2d = (Graphics2D)gra; int strokeWidth = 5; graphics2d.setStroke(new BasicStroke(strokeWidth));
graphics2d.setColor(Color.RED); Ellipse2D circle = new Ellipse2D.Double(60, 60, 300, 300); graphics2d.draw(circle);
graphics2d.setColor(Color.BLACK); Rectangle2D rect = new Rectangle2D.Double(50, 50, 320, 320); graphics2d.draw(rect);
graphics2d.setColor(Color.blue); Ellipse2D circle2 = new Ellipse2D.Float(80, 80, 260, 260); // graphics2d.draw(circle2); graphics2d.fill(circle2);
// 显示辛弃疾的词 graphics2d.setColor(Color.black); // graphics2d.setFont(pf); // graphics2d.drawString(poem, 10, canvasHeight-100);
drawStringWithFontStyleLineFeed(graphics2d,poem, 10, canvasHeight-100, pf);
}
@Override public Dimension getPreferredSize() { // System.out.println("running"); return new Dimension(canvasWidth, canvasHeight); }
//字符串总宽度 private int getStringLength(Graphics g, String str) { char[] strcha=str.toCharArray(); int strWidth = g.getFontMetrics().charsWidth(strcha, 0, str.length()); System.out.println("字符总宽度:"+strWidth); return strWidth; }
// //每一行字符串宽度 自定义 也就是画布中一行的宽度 // int rowWidth=1110; // //字符串字符的个数 // int strnum= str.length(); // //每一行字符的个数
private int getRowStrNum(int strnum,int rowWidth,int strWidth) { int rowstrnum=0; rowstrnum=(rowWidth*strnum)/strWidth; System.out.println("每行的字符数:"+rowstrnum); return rowstrnum; }
//字符行数 private int getRows(int strWidth,int rowWidth){ int rows=0; if(strWidth%rowWidth>0){ rows=strWidth/rowWidth+1; }else{ rows=strWidth/rowWidth; } System.out.println("行数:"+rows); return rows; }
//字符高度 private int getStringHeight(Graphics g) { int height = g.getFontMetrics().getHeight(); System.out.println("字符高度:"+height); return height; }
// 注意设置font 才能计算宽度和高度 // 开始绘制 private void drawStringWithFontStyleLineFeed(Graphics g, String strContent, int loc_X, int loc_Y, Font font) { g.setFont(font);
//获取字符串 字符的总宽度 int strWidth = getStringLength(g,strContent);
//每一行字符串宽度 int rowWidth = 500; System.out.println("每行字符宽度:"+rowWidth);
//获取字符高度 int strHeight=getStringHeight(g);
//字符串总个数 System.out.println("字符串总个数:"+strContent.length()); if(strWidth>rowWidth){
int rowstrnum=getRowStrNum(strContent.length(),rowWidth,strWidth); int rows= getRows(strWidth,rowWidth);
String temp=""; for (int i = 0; i < rows; i++) { //获取各行的String if(i==rows-1){ //最后一行 temp=strContent.substring(i*rowstrnum,strContent.length()); }else{ temp=strContent.substring(i*rowstrnum,i*rowstrnum+rowstrnum); } if(i>0){ //第一行不需要增加字符高度，以后的每一行在换行的时候都需要增加字符高度 loc_Y=loc_Y+strHeight; } g.drawString(temp, loc_X, loc_Y); } }else{ //直接绘制 g.drawString(strContent, loc_X, loc_Y); }
} }
} |
