import java.awt.*;
import javax.swing.*;interface MyShape{
void draw(Graphics g);
void setX1();
void setX2();
void setY1();
void setY2();
int getX1();
int getX2();
int getY1();
int getY2();
}
public class MyLine extends JFrame implements MyShape {
private int x1;
private int x2;
private int y1;
private int y2;
public MyLine(){
super("wwwww");
setSize(300,700);
setVisible(true);
}
public void setX1(){
x1=12;
}
public void setX2(){
x2=30;
}
public void setY1(){
y1=20;
}
public void setY2(){
y2=40;
}
public int getX1(){
return x1;
}
public int getX2(){
return x2;
}
public int getY1(){
return y1;
}
public int getY2(){
return y2;
}
public void draw(Graphics g){
g.drawLine(x1, y1, x2,y2);
}
public static void main(String[] args){
MyLine a=new MyLine();
a.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
我想在一窗口中画出一条线,但是上面代码不能实现,怎么回事?应该怎样做啊?(要用接口)
import javax.swing.*;interface MyShape{
void draw(Graphics g);
void setX1();
void setX2();
void setY1();
void setY2();
int getX1();
int getX2();
int getY1();
int getY2();
}
public class MyLine extends JFrame implements MyShape {
private int x1;
private int x2;
private int y1;
private int y2;
public MyLine(){
super("wwwww");
setSize(300,700);
setVisible(true);
}
public void setX1(){
x1=12;
}
public void setX2(){
x2=30;
}
public void setY1(){
y1=20;
}
public void setY2(){
y2=40;
}
public int getX1(){
return x1;
}
public int getX2(){
return x2;
}
public int getY1(){
return y1;
}
public int getY2(){
return y2;
}
public void draw(Graphics g){
g.drawLine(x1, y1, x2,y2);
}
public static void main(String[] args){
MyLine a=new MyLine();
a.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
我想在一窗口中画出一条线,但是上面代码不能实现,怎么回事?应该怎样做啊?(要用接口)
import javax.swing.*;interface MyShape{ void paint(Graphics g);
int getX1();
int getX2();
int getY1();
int getY2();
}
public class Test extends JFrame implements MyShape {
private int x1;
private int x2;
private int y1;
private int y2;
public Test(int x1,int x2,int y1,int y2){
super("Test");
this.x1 = x1;
this.x2 = x2;
this.y1 = y1;
this.y2 = y2; setSize(300,700);
repaint();
setVisible(true);
}
public int getX1(){
return x1;
}
public int getX2(){
return x2;
}
public int getY1(){
return y1;
}
public int getY2(){
return y2;
}
public void paint(Graphics g){
g.drawLine(x1,y1, x2, y2);
}
public static void main(String[] args){
Test a=new Test( 50, 80,500,400);a.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}}