本题程序的功能是计算1~10(包括1和10)中除5以外各个自然数的和。请将下述程序补充完整(注意:不得改动程序的结构,不得增行或删行)。 public class basic public static void main (String[] args) int i = 1; int sum = 0; while(i <= 10) if(i == 5) ______; ______; ______; i++; System.out.println ("sum="+sum);
本题程序的功能是监听键盘敲击事件,并将敲击的字符显示在标签上。开始时文字标签提示“Please press your keyboard!”,当按下键盘上的字符键时,文字标签就变为“’X’is pressed!”(X代表用户按下的键所代表的字符)。请将下述程序补充完整(注意:不得改动程序的结构,不得增行或删行)。 import java.awt.*; import java.awt.event.*; import javax.swing.*; public class simple extends Frame ______ public static void main(String args[]) simple f = new simple("simple"); Panel pan = new Panel(); f.init(); public simple(String str) super (str); public void init() addWindowListener(new WindowAdapter() public void windowClosing(WindowEvent e) System.exit (0); ); setSize(200,200); setLayout(new FlowLayout()); lab = new Label("Please press your keyboard!"); add(lab); addKeyListener(this); setVisible(true); public void keyTyped(KeyEvent e) lab.setText("\’"+______+"\’ is pressed!"); repaint(); public void keyPressed(KeyEvent e) public void keyReleased(KeyEvent e) private Label lab;
Briefly introduce Blake’s Songs of Innocence and Songs of Experience.
What are the factors that gave rise to American naturalism