為什么無法編譯呢???請(qǐng)大家?guī)蛶兔?,謝謝
package com.test.emp.code;
import java.io.File;
import java.nio.file.Path;
import java.util.HashMap;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
public class CreateCode {
public static void main(String[] args) {
int width = 300;
int height = 300;
String format ="png";
String content = "王琪是大美女";
HashMap hints = new HashMap();
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
hints.put(EncodeHintType.MARGIN, 2);
try {
BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height,hints);
Path file = new File("C:/code/img.png").toPath();
MatrixToImageWriter.writeToPath(bitMatrix, format, file);
} catch (Exception e) {?
e.printStackTrace();
}
}
}
2022-03-25
大多都是小白來學(xué)的,我就覺得老師講的很詳細(xì)的。我覺得是前者,可以調(diào)用繼承的方法和自己特有的方法。后者,調(diào)用Animal的方法,若子類Dog重寫了父類Animal方法,則調(diào)用重寫的方法。
2017-11-08