Java method: when does new Boolean(str) return true or false

foreword

When brushing the question, I encountered such a code:

int cities = isConnected.length;
boolean[] visited = new boolean[cities];

There are doubts about when new Boolean(str) returns false and when it returns true. I found out that a big guy made a summary:

Returns true when the incoming parameter ignores case and is equal to "true" , otherwise returns false.

source code

public static boolean parseBoolean(String s){
    return ((s != null) && s.equalsIgnoreCase("true");
}

public Boolean(String s){
    this(parseBoolean(s));
}
public Boolean (boolean value){
    this.value = value;
}

Several common methods

Use Boolean.valueOf(boolean value) to represent new Boolean(boolean value) because it is more efficient
to get the package type:
Boolean.valueOf(boolean value)
Boolean.valueOf(String s)

Methods for obtaining basic types:
Boolean.pareseBoolean(String s);
new Boolean().booleanValue();

Summarize

Returns true when the incoming parameter ignores case and is equal to "true", otherwise returns false.

Reposted from: When does java utility method series new Boolean(str) return true or false_Jiang Xiaobai's Blog-CSDN Blog