Give this class
package question;
class T {
private static final String JSON =
"{\n"
+ " \"a\": \"AAAAA AAA AAA AAA AA AAA AA AAAAA AA AAAAA AAA AAAA AAAA AA AAAA AAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAAA AAAAAA AAAAA AAA at $-15.4{^{\\\\,\\\\circ}\\\\text{C}}$ BBB BBBBB BB BBB $42.7{^{\\\\,\\\\circ}\\\\text{C}}$?\\n\\n(CC CC CCC CC CCCCC CCC CCC CCC CCC CCC CC = $1.95\\\\;{\\\\text{J}/\\\\text{g}\\\\cdot{^{\\\\circ}\\\\text{C}}}$; DDD DDD DDDD DDDD DDDDD DDDD DDD DD DDDD = $1.18\\\\;{\\\\text{J}/\\\\text{g}\\\\cdot{^{\\\\circ}\\\\text{C}}}$C; $\\\\Delta H_\\\\text{fus}$ = 5.72 kJ/mol; normal freezing point, $T_f$ = $28.3{^{\\\\,\\\\circ}\\\\text{C}}$)\",\n"
+ " \"b\": \"*EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EEE.*\\n\\nFF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF F $-15.4^\\\\circ\\\\text C$ to $28.3^\\\\circ\\\\text C$.\\n\\\\[q=mc\\\\Delta T=(10.1\\\\;\\\\mathrm{g})(1.95\\\\;\\\\mathrm{J/g\\\\cdot °C})(28.3\\\\;\\\\mathrm{ °C}-(-15.4)\\\\;\\\\mathrm{ °C})=860.6715\\\\;\\\\mathrm{J} \\\\]\\n\\nGG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GGGGGGGGGGGGGGGGGGGGG.\\n\\\\[q=nH_{fus}=(\\\\frac{10.1\\\\;\\\\mathrm{g}}{67.44\\\\;\\\\mathrm{g/mol}})(5720\\\\;\\\\mathrm{J})=856.6429\\\\;\\\\mathrm{J}\\\\]\\n\\nHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH $28.3^\\\\circ\\\\text C$ to $42.7^\\\\circ\\\\text C$.\\n\\\\[q=mc\\\\Delta T=(10.1\\\\;\\\\mathrm{g})(1.18\\\\;\\\\mathrm{J/g\\\\cdot °C})(42.7\\\\;\\\\mathrm{ °C}-28.3\\\\;\\\\mathrm{ °C})=171.6192\\\\;\\\\mathrm{J}\\\\]\\n\\nIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII.\\n\\\\[860.6715\\\\;\\\\mathrm{J}+856.6429\\\\;\\\\mathrm{J}+171.6192\\\\;\\\\mathrm{J}=1888.9336\\\\;\\\\mathrm{J}=1.89\\\\;\\\\mathrm{kJ}\\\\]\",\n"
+ "}";
private static final String JSON2 =
"{\n"
+ " \"a\": \"AAAAA AAA AAA AAA AA AAA AA AAAAA AA AAAAA AAA AAAA AAAA AA AAAA AAAA AAAAA AAAAA AAAAA AAAAA AAAAAA AAAAA AAAAAA AAAAA AAA at $-15.4{^{\\\\,\\\\circ}\\\\text{C}}$ BBB BBBBB BB BBB $42.7{^{\\\\,\\\\circ}\\\\text{C}}$?\\n\\n(CC CC CCC CC CCCCC CCC CCC CCC CCC CCC CC = $1.95\\\\;{\\\\text{J}/\\\\text{g}\\\\cdot{^{\\\\circ}\\\\text{C}}}$; DDD DDD DDDD DDDD DDDDD DDDD DDD DD DDDD = $1.18\\\\;{\\\\text{J}/\\\\text{g}\\\\cdot{^{\\\\circ}\\\\text{C}}}$C; $\\\\Delta H_\\\\text{fus}$ = 5.72 kJ/mol; normal freezing point, $T_f$ = $28.3{^{\\\\,\\\\circ}\\\\text{C}}$)\",\n"
+ " \"b\": \"*EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EEE.*\\n\\nFF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF F $-15.4^\\\\circ\\\\text C$ to $28.3^\\\\circ\\\\text C$.\\n\\\\[q=mc\\\\Delta T=(10.1\\\\;\\\\mathrm{g})(1.95\\\\;\\\\mathrm{J/g\\\\cdot °C})(28.3\\\\;\\\\mathrm{ °C}-(-15.4)\\\\;\\\\mathrm{ °C})=860.6715\\\\;\\\\mathrm{J} \\\\]\\n\\nGG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GGGGGGGGGGGGGGGGGGGGG.\\n\\\\[q=nH_{fus}=(\\\\frac{10.1\\\\;\\\\mathrm{g}}{67.44\\\\;\\\\mathrm{g/mol}})(5720\\\\;\\\\mathrm{J})=856.6429\\\\;\\\\mathrm{J}\\\\]\\n\\nHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH $28.3^\\\\circ\\\\text C$ to $42.7^\\\\circ\\\\text C$.\\n\\\\[q=mc\\\\Delta T=(10.1\\\\;\\\\mathrm{g})(1.18\\\\;\\\\mathrm{J/g\\\\cdot °C})(42.7\\\\;\\\\mathrm{ °C}-28.3\\\\;\\\\mathrm{ °C})=171.6192\\\\;\\\\mathrm{J}\\\\]\\n\\nIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII.\\n\\\\[860.6715\\\\;\\\\mathrm{J}+856.6429\\\\;\\\\mathrm{J}+171.6192\\\\;\\\\mathrm{J}=1888.9336\\\\;\\\\mathrm{J}=1.89\\\\;\\\\mathrm{kJ}\\\\]\",\n"
+ "}";
public static void main(String[] args) {
System.out.println(JSON);
}
}
I ran the main method to ensure it is valid java source code

But when trying to format it using GJF, I got
Exception in thread "main" java.lang.IndexOutOfBoundsException: Index 42 out of bounds for length 22
at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:100)
at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:106)
at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:302)
at java.base/java.util.Objects.checkIndex(Objects.java:385)
at java.base/java.util.ArrayList.get(ArrayList.java:427)
at java.base/java.util.Collections$UnmodifiableList.get(Collections.java:1502)
at com.google.googlejavaformat.java.FormatterException.formatDiagnostics(FormatterException.java:70)
at com.google.googlejavaformat.java.Main.formatFiles(Main.java:177)
at com.google.googlejavaformat.java.Main.format(Main.java:128)
at com.google.googlejavaformat.java.Main.main(Main.java:91)
at com.google.googlejavaformat.java.Main.main(Main.java:81)
at com.google.googlejavaformat.java.Main.main(Main.java:70)
Digging into the GJF, I found 2 issues:
- The
com.google.googlejavaformat.java.StringWrapper#applyReplacements give wrong result:
package question;
class T {
private static final String JSON =
"{\n"
+ " \"a\": \"AAAAA AAA AAA AAA AA AAA AA AAAAA AA AAAAA AAA AAAA AAAA AA AAAA AAAA AAAAA"
+ " AAAAA AAAAA AAAAA AAAAAA AAAAA AAAAAA AAAAA AAA at $-15.4{^{\\\\,\\\\circ}\\\"
+ "\text{C}}$ BBB BBBBB BB BBB $42.7{^{\\\\,\\\\circ}\\\\text{C}}$?\\n"
+ "\\n"
+ "(CC CC CCC CC CCCCC CCC CCC CCC CCC CCC CC = $1.95\\\\;{\\\\text{J}/\\\"
+ "\text{g}\\\\cdot{^{\\\\circ}\\\\text{C}}}$; DDD DDD DDDD DDDD DDDDD DDDD DDD DD DDDD ="
+ " $1.18\\\\;{\\\\text{J}/\\\\text{g}\\\\cdot{^{\\\\circ}\\\\text{C}}}$C; $\\\\Delta"
+ " H_\\\\text{fus}$ = 5.72 kJ/mol; normal freezing point, $T_f$ ="
+ " $28.3{^{\\\\,\\\\circ}\\\\text{C}}$)\",\n"
+ " \"b\": \"*EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE"
+ " EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE"
+ " EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EEE.*\\n"
+ "\\n"
+ "FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF F"
+ " $-15.4^\\\\circ\\\\text C$ to $28.3^\\\\circ\\\\text C$.\\n"
+ "\\\\[q=mc\\\\Delta T=(10.1\\\\;\\\\mathrm{g})(1.95\\\\;\\\\mathrm{J/g\\\\cdot"
+ " °C})(28.3\\\\;\\\\mathrm{ °C}-(-15.4)\\\\;\\\\mathrm{ °C})=860.6715\\\\;\\\\mathrm{J}"
+ " \\\\]\\n"
+ "\\n"
+ "GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG"
+ " GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GGGGGGGGGGGGGGGGGGGGG.\\n"
+ "\\\\[q=nH_{fus}=(\\\\frac{10.1\\\\;\\\\mathrm{g}}{67.44\\\\;\\\\mathrm{g/mol}})(5720\\\\;\\\\mathrm{J})=856.6429\\\\;\\\\mathrm{J}\\\\]\\n"
+ "\\n"
+ "HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH $28.3^\\\\circ\\\\text C$ to"
+ " $42.7^\\\\circ\\\\text C$.\\n"
+ "\\\\[q=mc\\\\Delta T=(10.1\\\\;\\\\mathrm{g})(1.18\\\\;\\\\mathrm{J/g\\\\cdot"
+ " °C})(42.7\\\\;\\\\mathrm{ °C}-28.3\\\\;\\\\mathrm{"
+ " °C})=171.6192\\\\;\\\\mathrm{J}\\\\]\\n"
+ "\\n"
+ "IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII.\\n"
+ "\\\\[860.6715\\\\;\\\\mathrm{J}+856.6429\\\\;\\\\mathrm{J}+171.6192\\\\;\\\\mathrm{J}=1888.9336\\\\;\\\\mathrm{J}=1.89\\\\;\\\\mathrm{kJ}\\\\]\",\n"
+ "}";
private static final String JSON2 =
"{\n"
+ " \"a\": \"AAAAA AAA AAA AAA AA AAA AA AAAAA AA AAAAA AAA AAAA AAAA AA AAAA AAAA AAAAA"
+ " AAAAA AAAAA AAAAA AAAAAA AAAAA AAAAAA AAAAA AAA at $-15.4{^{\\\\,\\\\circ}\\\"
+ "\text{C}}$ BBB BBBBB BB BBB $42.7{^{\\\\,\\\\circ}\\\\text{C}}$?\\n"
+ "\\n"
+ "(CC CC CCC CC CCCCC CCC CCC CCC CCC CCC CC = $1.95\\\\;{\\\\text{J}/\\\"
+ "\text{g}\\\\cdot{^{\\\\circ}\\\\text{C}}}$; DDD DDD DDDD DDDD DDDDD DDDD DDD DD DDDD ="
+ " $1.18\\\\;{\\\\text{J}/\\\\text{g}\\\\cdot{^{\\\\circ}\\\\text{C}}}$C; $\\\\Delta"
+ " H_\\\\text{fus}$ = 5.72 kJ/mol; normal freezing point, $T_f$ ="
+ " $28.3{^{\\\\,\\\\circ}\\\\text{C}}$)\",\n"
+ " \"b\": \"*EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE"
+ " EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE"
+ " EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EE EEE.*\\n"
+ "\\n"
+ "FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF F"
+ " $-15.4^\\\\circ\\\\text C$ to $28.3^\\\\circ\\\\text C$.\\n"
+ "\\\\[q=mc\\\\Delta T=(10.1\\\\;\\\\mathrm{g})(1.95\\\\;\\\\mathrm{J/g\\\\cdot"
+ " °C})(28.3\\\\;\\\\mathrm{ °C}-(-15.4)\\\\;\\\\mathrm{ °C})=860.6715\\\\;\\\\mathrm{J}"
+ " \\\\]\\n"
+ "\\n"
+ "GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG"
+ " GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GG GGGGGGGGGGGGGGGGGGGGG.\\n"
+ "\\\\[q=nH_{fus}=(\\\\frac{10.1\\\\;\\\\mathrm{g}}{67.44\\\\;\\\\mathrm{g/mol}})(5720\\\\;\\\\mathrm{J})=856.6429\\\\;\\\\mathrm{J}\\\\]\\n"
+ "\\n"
+ "HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH $28.3^\\\\circ\\\\text C$ to"
+ " $42.7^\\\\circ\\\\text C$.\\n"
+ "\\\\[q=mc\\\\Delta T=(10.1\\\\;\\\\mathrm{g})(1.18\\\\;\\\\mathrm{J/g\\\\cdot"
+ " °C})(42.7\\\\;\\\\mathrm{ °C}-28.3\\\\;\\\\mathrm{"
+ " °C})=171.6192\\\\;\\\\mathrm{J}\\\\]\\n"
+ "\\n"
+ "IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII.\\n"
+ "\\\\[860.6715\\\\;\\\\mathrm{J}+856.6429\\\\;\\\\mathrm{J}+171.6192\\\\;\\\\mathrm{J}=1888.9336\\\\;\\\\mathrm{J}=1.89\\\\;\\\\mathrm{kJ}\\\\]\",\n"
+ "}";
public static void main(String[] args) {
System.out.println(JSON);
}
}
This result is completely not compilable

com.google.googlejavaformat.java.FormatterException#formatDiagnostics using wrong param to format the diagnostics: It uses the original java content (22 lines intotal) instead of formatted java content (79 lines in total). That is why we getting IndexOutOfBoundsException
Give this class
I ran the

mainmethod to ensure it is valid java source codeBut when trying to format it using GJF, I got
Digging into the GJF, I found 2 issues:
com.google.googlejavaformat.java.StringWrapper#applyReplacementsgive wrong result:This result is completely not compilable

com.google.googlejavaformat.java.FormatterException#formatDiagnosticsusing wrong param to format the diagnostics: It uses the original java content (22 lines intotal) instead of formatted java content (79 lines in total). That is why we getting IndexOutOfBoundsException