what does this error message mean ? Project01.java X Taib integer.cl 1 import javax.swing.JOptionPane; // for input

what does this error message mean ?

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Project01.java X Taib integer.cl 1 import javax.swing.JOptionPane; // for input and output dialogue 3 public class Project 1 4 { 5 6e 7 7890123 11 12 14 15 16 17 18 19 ធនជននិងងខភ៩៣៩០០ 20 21 22 23 24 25 26 27 28 29 30 www. 31 32 33 34 35 36 37 20 public static void main(String[] args) { // define variables String firstName; String lastName; int p1, p2, p3, p4, p5, p6, p7, p8; int hwl, hw2, hw3; int test1, test2, test3, test4; int attendance; double percent Projects, percent Tests, percentAttendance, percentClass; // get input from user firstName= JOption Pane.showInput Dialog(null, "Enter First Name)", "First Name", lastName= JOptionPane.showInputDialog (null, "Enter Last Name)", "Last Name", JOptionPane. QUESTION_MESSAGE); String input = null; p1= Integer.parseInt(input); input JOptionPane.showInput Dialog(null, "Enter a Positive Integer Number<=100", "Grade (Project 1)", JOptionPane. QUESTION_MESSAGE); // convert string input to integer p2 = = Integer.parseInt(input); input = JOptionPane.showInput Dialog(null, "Enter a Positive Integer Number<=100", "Grade (Project 2)", 10ntionDane QUESTION MECCACE). Problems @Javadoc Declaration Console X <terminated> ClassPractice [Java Application] /Users/a/.p2/pool/plugins/org.eclipse.justj.openjdk.hotspot.jre.full.macosx.x86 Exception in thread "main" java.lang.NumberFormatException: Cannot parse null string at java.base/java.lang. Integer.parseInt(Integer.java:630) at java.base/java.lang. Integer.parseInt(Integer.java:784) at Project01.main (Project01.java:25) Project01.java X Taib integer.cl 1 import javax.swing.JOptionPane; // for input and output dialogue 3 public class Project 1 4 { 5 6e 7 7890123 11 12 14 15 16 17 18 19 ធនជននិងងខភ៩៣៩០០ 20 21 22 23 24 25 26 27 28 29 30 www. 31 32 33 34 35 36 37 20 public static void main(String[] args) { // define variables String firstName; String lastName; int p1, p2, p3, p4, p5, p6, p7, p8; int hwl, hw2, hw3; int test1, test2, test3, test4; int attendance; double percent Projects, percent Tests, percentAttendance, percentClass; // get input from user firstName= JOption Pane.showInput Dialog(null, "Enter First Name)", "First Name", lastName= JOptionPane.showInputDialog (null, "Enter Last Name)", "Last Name", JOptionPane. QUESTION_MESSAGE); String input = null; p1= Integer.parseInt(input); input JOptionPane.showInput Dialog(null, "Enter a Positive Integer Number<=100", "Grade (Project 1)", JOptionPane. QUESTION_MESSAGE); // convert string input to integer p2 = = Integer.parseInt(input); input = JOptionPane.showInput Dialog(null, "Enter a Positive Integer Number<=100", "Grade (Project 2)", 10ntionDane QUESTION MECCACE). Problems @Javadoc Declaration Console X <terminated> ClassPractice [Java Application] /Users/a/.p2/pool/plugins/org.eclipse.justj.openjdk.hotspot.jre.full.macosx.x86 Exception in thread "main" java.lang.NumberFormatException: Cannot parse null string at java.base/java.lang. Integer.parseInt(Integer.java:630) at java.base/java.lang. Integer.parseInt(Integer.java:784) at Project01.main (Project01.java:25)

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The error message indicates a NumberFormatException which occurs when you t... View the full answer