strategya.java

23种设计模式的java实现 include vistor,proxy,bridge

/**
 *  A concrete strategy to draw a text by the width of line
 */
import java.io.*;

public class StrategyA implements Strategy {
    public StrategyA() {
    }
    public void drawText(String text, int lineWidth, int lineCount) {
        if(lineWidth > 0) {
            int len = text.length();
            int start = 0;
            System.out.println("----- String length is :" + len + ", line width is :" + lineWidth);
            while(len > 0) {
                if(len <= lineWidth) {
                    System.out.println(text.substring(start));
                } else {
                    System.out.println(text.substring(start, start+lineWidth));
                }
                len = len - lineWidth;
                start += lineWidth;
            }
        } else {
            System.out.println("line width can not < 1 !");
        }
    }
}