Java.lang.exception while creating an object -
Java.lang.exception while creating an object -
i trying create assignment have check if rectangels overlap or not , few other methods. have completed cant create new objects class. giving me error:(121, 32) java: unreported exception java.lang.exception; must caught or declared thrown here code
/** * created sarang on 18-10-2014. */ import java.awt.*; import java.util.arraylist; import java.util.list; import java.util.random; import java.util.scanner; import javax.swing.jframe; import javax.swing.jpanel; import java.io.*; public class rectangle { private int upper_x, upper_y, lower_x, lower_y; public rectangle(int upper1, int upper2,int lower1,int lower2) throws exception { this.upper_x=upper1; this.upper_y=upper2; this.lower_x=lower1; this.lower_y=lower2; seek { if (upper_x > lower_x || upper_y > lower_y) { throw new illegalargumentexception(); //checking if rectangle valid } if(lower_x >500) {lower_x=500;} if(lower_y>500) {lower_y=500;} //setting lower bounds 500 if(upper_x<50) {upper_x=50;} if(upper_y<50) {upper_y=50;} } grab (illegalargumentexception iae) { system.out.println("invalid rectangle"); } } rectangle( rectangle other) { upper_x=other.upper_x; upper_y=other.upper_y; lower_x=other.lower_x; lower_y=other.lower_y; } public boolean overlap(rectangle other) { if(upper_x<other.upper_x && upper_y<other.upper_y && lower_x>other.lower_x && lower_y>other.lower_y) { homecoming false;} if (!( lower_y < other.upper_y || upper_y > other.lower_y || lower_x < other.upper_x || upper_x > other.lower_x )) { homecoming true;} homecoming false; } public boolean containedin(rectangle other) { if(upper_x<other.upper_x && upper_y<other.upper_y && lower_x>other.lower_x && lower_y>other.lower_y) { homecoming true;} if(other.upper_x<upper_x && other.upper_y<upper_y && other.lower_x>lower_x && other.lower_y>lower_y) { homecoming true; } homecoming false; } public boolean drag(int x, int y) { int temp_1x=upper_x; int temp_1y=upper_y; int temp_2x=lower_x; int temp_2y=lower_y; int length=lower_x-upper_x; int height=lower_y-upper_y; upper_x=x-length/2; upper_y=y-height/2; lower_x=x+length/2; lower_x=y+height/2; if(upper_x<50||upper_y<50||lower_x>500||lower_y>500) { upper_x=temp_1x; upper_y=temp_1y; lower_x=temp_2x; lower_y=temp_2y; homecoming false; } homecoming true; } public boolean resize(int x, int y) { int temp_x,temp_y; temp_x=lower_x; temp_y=lower_y; lower_x=x; lower_y=y; if (upper_x > lower_x || upper_y > lower_y) { lower_x=temp_x; lower_y=temp_y; homecoming false; } if(lower_x >500||lower_y>500) { lower_x=temp_x; lower_y=temp_y; homecoming false; } homecoming true; } public int getupperx(){return upper_x;} public int getuppery(){return upper_y;} public int getlowerx(){return lower_x;} public int getlowery(){return lower_y;} public static void main(string[] args) throws ioexception { rectangle rectangle1 = new rectangle(60,70,400,400); rectangle rectangle2 = new rectangle(100,100,450,450); system.out.println("rectangle1.overlap(rectangle2):" + rectangle1.overlap(rectangle2)); system.out.println("rectangle1.containedin(rectangle2):" +rectangle1.containedin(rectangle2)); } /* * * code below comment visual display of 2d array of rectangles. * not supposed create changes or add together code below comment. * */ class showrecs extends jframe { public showrecs(rectangle[] rectarr) { // super("display arrays"); // rectangle[] r1 = rt.rarr; setdefaultcloseoperation(jframe.exit_on_close); displayrecs recs = new displayrecs(); getcontentpane().add(recs); (int = 0; < rectarr.length; i++) { int w = rectarr[i].getlowerx() - rectarr[i].getupperx(); int h = rectarr[i].getlowery() - rectarr[i].getuppery(); recs.addarrays(rectarr[i].getupperx(), rectarr[i].getuppery(), w, h); } pack(); setlocationrelativeto(null); setvisible(true); } } class displayrecs extends jpanel { private static final int frame_width = 500; private static final int frame_height = frame_width; private list<java.awt.rectangle> rects = new arraylist<java.awt.rectangle>(); public void addarrays(int x, int y, int width, int height) { java.awt.rectangle rect = new java.awt.rectangle(x, y, width, height); rects.add(rect); } @override public dimension getpreferredsize() { homecoming new dimension(frame_width, frame_height); } @override protected void paintcomponent(graphics g) { super.paintcomponent(g); graphics2d g2 = (graphics2d) g; (java.awt.rectangle rect : rects) { random rand = new random(); int r = rand.nextint(255); int g = rand.nextint(255); int b = rand.nextint(255); color color = new color(r, g, b); g.setcolor(color); g.drawstring("(" + rect.x + "," + rect.y + ")", rect.x - 45, rect.y); int m = rect.x + rect.width; int l = rect.y + rect.height; int idx = rects.indexof(rect); g.drawstring("(" + m + "," + l + ")", m + 1, l + 1); int locx = rect.x + rect.width / 2; int locy = rect.y + rect.height / 2; g.drawstring((string.valueof(idx)), locx, locy); g2.draw(rect); } } } } what have done wrong in code. have yet apply other methods not running @ stage
you have:
public rectangle(int upper1, int upper2,int lower1,int lower2) throws exception { ^^^^^^^^^^^^^^^^^ that saying rectangle constructor can throw any kind of exception. means code calls constructor has deal kind of exception (either catching or declaring thrown).
it looks constructor throwing illegalargumentexception, unchecked (doesn't need declared in throws clause). if take off throws, should work.
public rectangle(int upper1, int upper2,int lower1,int lower2) { ... java
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