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help i get invalid code and the errors will show on the next post

Discuss help i get invalid code and the errors will show on the next post in the Java Development forum on Dev Articles.
help i get invalid code and the errors will show on the next post Java Development forum discussing Java, JSP, J2ME. Get help with Java and all of its related languages, libraries and variations. If it’s Java-related, you can discuss it here.

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  #1  
Old March 5th, 2004, 02:43 PM
Harryortho Harryortho is offline
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Unhappy help i get invalid code and the errors will show on the next post
here is the code with the error messages on the bottom, any help??
import java.applet.*;
import java.awt.*;
import java.awt.event.*;

public class GraphDisplayScrollbars extends Applet implements AdjustmentListener{
int height = 250;
int width = 300;

int leftMargin = 40;
int rightMargin = 40;
int topMargin = 40;
int bottomMargin = 40;

double xmin = 0;
double xmax = 10;
double ymin = -10;
double ymax = 10;

double a;
double b;
double c;
double d;

private Scrollbar sliderA;
private int sliderAValue = 0;

private Scrollbar sliderB;
private int sliderBValue = 0;

private Scrollbar sliderC;
private int sliderCValue = 0;

private Scrollbar sliderD;
private int sliderDValue = 0;

public void init() {

Label A, B, C, D;

A = new Label("A");
add(A);

sliderA = new Scrollbar(Scrollbar.HORIZONTAL, 0, 1, 0, 50);
add(sliderA);
sliderA.addAdjustmentListener(this);

B = new Label("B");
add(B);
sliderB = new Scrollbar(Scrollbar.VERTICAL, 0, 1 0, 50);
add(sliderB);
sliderB.addAdjustmentListener(this);

C = new Label("C");
add(C);
sliderC = new Scrollbar(Scrollbar.VERTICAL, 0, 1, 0, 50);
add(sliderC);
sliderC.addAdjustmentListener(this);

D = new Label ("D");
add(D);
sliderD = new Scrollbar(Scrollbar.VERTICAL, 0, 1, 0, 100);
add(sliderD);
sliderD.addAdjustmentListener(this);
}

public void paint(Graphics g) {
g.drawLine(scaleX(xmin), scaleY(ymin), scaleX(xmax), scaleY(ymin));
g.drawLine(scaleX(xmin), scaleY(ymin), scaleX(xmin), scaleY(ymax));
g.drawString(" A = " + sliderAValue, 50, 240);
g.drawString(" B = " + sliderBValue, 70, 240);
g.drawString(" C = " + sliderCValue, 90, 240);
g.drawString(" D = " + sliderDValue, 110, 240);
double x, y;
double xlast = xmin;
double ylast = funct(xmin, a, b, c, d);

for (int i=0; i<100; i++){
x = xmin + i*(xmax-xmin)/100.0;
y = funct(x, a, b, c, d);
if (x >= xmin && x <=xmax && y >= ymin && y <= ymax) {
g.drawLine(scaleX(xlast), scaleY(ylast), scaleX(x), scaleY(y));
}
xlast = x;
ylast = y;
}
}
private int scaleX(double x) {
double xRange = xmax - xmin;
int pixelRange = width - leftMargin - rightMargin;
int pixelX = leftMargin + (int) Math.round ((x-xmin)*pixelRange/xRange);
return pixelX;
}
private int scaleY(double y) {
double yRange = ymax - ymin;
int pixelRange = height - topMargin - bottomMargin;
int pixelY = topMargin + (int) Math.round((ymax - y)*pixelRange/yRange);
return pixelY;
}
private double funct(double x, double a, double b, double c, double d){
return a + x*b + Math.pow(x,2)*c + Math.pow(x,3)*d;
}
public void adjustmentValueChanged(AdjustmentEvent e) {
sliderAValue = sliderA.getValue();
sliderBValue = sliderB.getValue();
sliderCValue = sliderC.getValue();
sliderDValue = sliderD.getValue();
repaint();
}
}
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  #2  
Old March 5th, 2004, 02:45 PM
Harryortho Harryortho is offline
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here is the error message
Compiling GraphDisplayScrollbars.java...
GraphDisplayScrollbars.java:42: illegal character: \160



^

GraphDisplayScrollbars.java:42: illegal character: \160



^

GraphDisplayScrollbars.java:42: illegal character: \160



^

GraphDisplayScrollbars.java:42: illegal character: \160



^

GraphDisplayScrollbars.java:42: illegal character: \160



^

GraphDisplayScrollbars.java:42: illegal character: \160



^

GraphDisplayScrollbars.java:42: illegal character: \160



^

GraphDisplayScrollbars.java:42: illegal character: \160



^

GraphDisplayScrollbars.java:42: illegal character: \160



^

GraphDisplayScrollbars.java:42: illegal character: \160



^

GraphDisplayScrollbars.java:42: illegal character: \160



^

11 errors

Done.
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  #3  
Old March 5th, 2004, 04:04 PM
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dhouston dhouston is offline
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Moved this to the java forum rather than the javascript forum. Big difference.

Which line is 42?
__________________
Please don't PM me asking for solutions outside the scope of a thread.
Keeping all responses in a thread stands to help others who come along later,
which is after all what this forum's all about.
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  #4  
Old March 5th, 2004, 04:47 PM
Harryortho Harryortho is offline
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this is what i get
import java.applet.*;
import java.awt.*;
import java.awt.event.*;

public class GraphDisplayScrollbars extends Applet implements AdjustmentListener{
int height = 250;
int width = 300;

int leftMargin = 40;
int rightMargin = 40;
int topMargin = 40;
int bottomMargin = 40;

double xmin = 0;
double xmax = 10;
double ymin = -10;
double ymax = 10;

double a;
double b;
double c;
double d;

private Scrollbar sliderA;
private int sliderAValue = 0;

private Scrollbar sliderB;
private int sliderBValue = 0;

private Scrollbar sliderC;
private int sliderCValue = 0;

private Scrollbar sliderD;
private int sliderDValue = 0;

public void init() {
// Label A, B, C, D;
Label Aa = new Label("A");
add(Aa);
sliderA = new Scrollbar(Scrollbar.VERTICAL, 0, 1, 0, 50);
add(sliderA);
sliderA.addAdjustmentListener(this);

Label Ba = new Label("B");
add(Ba);
sliderB = new Scrollbar(Scrollbar.VERTICAL, 0, 1, 0, 50);
add(sliderB);
sliderB.addAdjustmentListener(this);

Label Ca = new Label("C");
add(Ca );
sliderC = new Scrollbar(Scrollbar.VERTICAL, 0, 1, 0, 50);
add(sliderC);
sliderC.addAdjustmentListener(this);

Label Da = new Label ("D");
add(Da);
sliderD = new Scrollbar(Scrollbar.VERTICAL, 0, 1, 0, 100);
add(sliderD);
sliderD.addAdjustmentListener(this);
}

public void paint(Graphics g) {
g.drawLine(scaleX(xmin), scaleY(ymin), scaleX(xmax), scaleY(ymin));
g.drawLine(scaleX(xmin), scaleY(ymin), scaleX(xmin), scaleY(ymax));
g.drawString(" A = " + sliderAValue, 50, 240);
g.drawString(" B = " + sliderBValue, 70, 240);
g.drawString(" C = " + sliderCValue, 90, 240);
g.drawString(" D = " + sliderDValue, 110, 240);
double x, y;
double xlast = xmin;
double ylast = funct(xmin, a, b, c, d);

for (int i=0; i<100; i++){
x = xmin + i*(xmax-xmin)/100.0;
y = funct(x, a, b, c, d);
if (x >= xmin && x <=xmax && y >= ymin && y <= ymax) {
g.drawLine(scaleX(xlast), scaleY(ylast), scaleX(x), scaleY(y));
}
xlast = x;
ylast = y;
}
}
private int scaleX(double x) {
double xRange = xmax - xmin;
int pixelRange = width - leftMargin - rightMargin;
int pixelX = leftMargin + (int) Math.round ((x-xmin)*pixelRange/xRange);
return pixelX;
}
private int scaleY(double y) {
double yRange = ymax - ymin;
int pixelRange = height - topMargin - bottomMargin;
int pixelY = topMargin + (int) Math.round((ymax - y)*pixelRange/yRange);
return pixelY;
}
private double funct(double x, double a, double b, double c, double d){
return a + x*b + Math.pow(x,2)*c + Math.pow(x,3)*d;
}
public void adjustmentValueChanged(AdjustmentEvent e) {
sliderAValue = sliderA.getValue();
sliderBValue = sliderB.getValue();
sliderCValue = sliderC.getValue();
sliderDValue = sliderD.getValue();
repaint();
}
}


and this is what the compliler sais
Building Project...
Compiling Graph1.java...
Graph1.java:39: illegal character: \160

add(Aa);

^

Graph1.java:39: illegal character: \160

add(Aa);

^

Graph1.java:39: illegal character: \160

add(Aa);

^

Graph1.java:39: illegal character: \160

add(Aa);

^

Graph1.java:39: illegal character: \160

add(Aa);

^

Graph1.java:39: illegal character: \160

add(Aa);

^

Graph1.java:39: illegal character: \160

add(Aa);

^

Graph1.java:39: illegal character: \160

add(Aa);

^

Graph1.java:39: illegal character: \160

add(Aa);

^

Graph1.java:39: illegal character: \160

add(Aa);

^

Graph1.java:58: illegal character: \160

sliderD = new Scrollbar(Scrollbar.VERTICAL, 0, 1, 0, 100);

^

Graph1.java:58: ')' expected

sliderD = new Scrollbar(Scrollbar.VERTICAL, 0, 1, 0, 100);

^

Graph1.java:5: class GraphDisplayScrollbars is public, should be declared in a file named GraphDisplayScrollbars.java

public class GraphDisplayScrollbars extends Applet implements AdjustmentListener{

^

13 errors

Done.
Done.
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