https://www.ossez.com/t/java-numberformatexception/13986 字符串格式数值的内容

core-java-modules/core-java-strings/src/main/java/com/baeldung/multiline/MultiLineString.java

@@ -10,9 +10,9 @@ import java.nio.file.Files;
 import java.nio.file.Paths;
 
 public class MultiLineString {
-
+    
     String newLine = System.getProperty("line.separator");
-
+    
     public String stringConcatenation() {
         return "Get busy living"
                 .concat(newLine)
@@ -22,7 +22,7 @@ public class MultiLineString {
                 .concat(newLine)
                 .concat("--Stephen King");
     }
-
+    
     public String stringJoin() {
         return String.join(newLine,
                            "Get busy living",
@@ -30,7 +30,7 @@ public class MultiLineString {
                            "get busy dying.",
                            "--Stephen King");
     }
-
+    
     public String stringBuilder() {
         return new StringBuilder()
                 .append("Get busy living")
@@ -42,7 +42,7 @@ public class MultiLineString {
                 .append("--Stephen King")
                 .toString();
     }
-
+    
     public String stringWriter() {
         StringWriter stringWriter = new StringWriter();
         PrintWriter printWriter = new PrintWriter(stringWriter);
@@ -52,26 +52,23 @@ public class MultiLineString {
         printWriter.println("--Stephen King");
         return stringWriter.toString();
     }
-
+    
     public String guavaJoiner() {
         return Joiner.on(newLine).join(ImmutableList.of("Get busy living",
             "or",
             "get busy dying.",
             "--Stephen King"));
     }
-
+    
     public String loadFromFile() throws IOException {
         return new String(Files.readAllBytes(Paths.get("src/main/resources/stephenking.txt")));
     }
 
-
-//    public String textBlocks() {
-//
-//        // THIS ONLY FOR JDK 15
-//        return """
-//            Get busy living
-//            or
-//            get busy dying.
-//            --Stephen King""";
-//    }
+    public String textBlocks() {
+        return """
+            Get busy living
+            or
+            get busy dying.
+            --Stephen King""";
+    }
 }

core-java-modules/core-java-strings/src/test/java/com/baeldung/multiline/MultiLineStringUnitTest.java

@@ -16,7 +16,7 @@ public class MultiLineStringUnitTest {
         assertEquals(ms.stringJoin(), ms.stringBuilder());
         assertEquals(ms.stringBuilder(), ms.guavaJoiner());
         assertEquals(ms.guavaJoiner(), ms.loadFromFile());
-//        assertEquals(ms.loadFromFile(), ms.textBlocks());
+        assertEquals(ms.loadFromFile(), ms.textBlocks());
     }
     
 }