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java窗体程序问题,代码无错误,运行报错?
package newThree;import java.awt.*;import java.net.URL;import javax.swing.*;public class newIconJPG extends JFrame{public newIconJPG(){ Container container = getContentPane();JLabel jl = new JLabel(马,...
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java真的很难学吗?
都说java很难,真的很难学吗?
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