![](https://lstatic.shangxueba.com/jiandati/pc/images/pc_jdt_tittleico.png)
关于下面的程序Test.java说法正确的是()。public class Test {String x="1";int y;
关于下面的程序Test.java说法正确的是()。
public class Test {
String x="1";
int y;
public static void main(String args[]) {
int z=2;
System.out.println(x+y+z);
}
}
A.3
B.102
C.12
D.程序有编译错误
![](https://lstatic.shangxueba.com/jiandati/pc/images/jdt_panel_vip.png)
关于下面的程序Test.java说法正确的是()。
public class Test {
String x="1";
int y;
public static void main(String args[]) {
int z=2;
System.out.println(x+y+z);
}
}
A.3
B.102
C.12
D.程序有编译错误
B.7
C.8
D.6
窗口。
import java.awt.*;
import java.awt.event.*;
public class java3 extends Frame{
java3(){
super("java3");
addNotify();
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
System.exit(0);
}
});
Insets insets=getInsets();
setSize(insets.left+insets.right+150,
insets.top+insets.bottom+150);
this.addMouseListener(MouseEventHandler());
}
class MouseEventHandler implements MouseAda-
pter{
public void mousePresse(MouseEvent evt){
Rectangle bounds=getBounds();
int x=evt.getX()+bounds.x;
int y=evt.getY()十bounds.y;
java3 m=newjava3();
m.setLocation(x,y);
m.show();
}
}
static public void main(String[]args){
(new java3()).show();
}
}
注意:不改动程序的结构,不得增行或删行。
import java.awt.*;
import java.applet.*;
import java.lang.*;
public class exl2_3 extends Applet{
private TextField tf;
private Button btn;
public void init(){
tf=new TextField(25);
add(tf);
btn=new Button("确定");
add(btn);
resize(250,200);
}
public void paint(Craphics g){
try{
int n= tf.getText();
int i,j,x=20,y=60;
for(i=0;i<n;++){
for(j=1;j<=n;j++){
g.drawString(Integer.toString(i)+"*"
+Integer.toString(j)+"="
+Integer.toString(i*j),
i*x,j*y);
}
}
}
catch(NuaberFormatEXCeption nfe){
g.drawString("error namber!",20,50);
}
}
public boolean action(Event e,Object o){
if(o=="确定"){
repaint();
return true;
}
else
return false;
}
}
exl2_3.html
<HTML>
<HEAD>
<TITLE>exl2_3</TITLE>
</HEAD>
<BODY>
<applet code="exl2_3.class"width=800 height=400>
</applet>
</BODY>
</HTMI>
A、s1 == s2
B、s2 == s3
C、m == s1
D、s1.equals(m)
A、装箱
B、拆箱
C、同时装箱和拆箱
D、都不是
B.期待疗法
C.催产素引产
D.保持外阴清洁,会阴擦洗每日2次
E.监测胎心
F.密切观察体温
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